11. What is the simplified form of y(y-9)= 21? A. y²--9y+21=0B. y²--21=0c. y²--9y--21=0d.y²+9y+21=0
1. 11. What is the simplified form of y(y-9)= 21? A. y²--9y+21=0B. y²--21=0c. y²--9y--21=0d.y²+9y+21=0
Answer:
QUESTION11. What is the simplified form of y(y-9)= 21? A. y²--9y+21=0B. y²--21=0c. y²--9y--21=0d.y²+9y+21=0AMSWER:A.2. 18.Which of the following has -3 and 7 as roots?a.x2 + 4x - 21 =0b.x2 - 4x + 21 =0c.x2 - 4x - 21 = 0d.x2 + 4x + 21 = 0
Answer:
B. x^2 - 4x - 21 =0
Step-by-step explanation:
b. x^2 - 4x - 21 =0
(-7)(3)=-21=(7)(-3)
Since bx(-4x) is negative, the larger constant is negative
=(x-7)(x+3)
x=7||x=-3
To reduce to time use Viete's Theoremrs = c/a and r+s = -b/a
In this case r = -3 and s = 7
rs = -21 and r+s = 4
The answer is C
x²-4x-21 = 0
3. 1. What is the standard form of the equation?a. 3x2 + 5x + 21 = 0c. 3x25x-21 = 0b. 3x2 - 5x - 21 = 0d. 3x2 - 5x + 21 = 0
Answer:
b.
Step-by-step explanation:
if wrong please give me 1 ⭐ 1❤
4. 0•21=______,5•0=_______
Answer:
0,0
Step-by-step explanation:
0×21=0, 5×0=0.any number multiplied by 0 the answer/s is /are always 0
5. 3. Find the solution of the rational equation - 1 = 00.a. 21b. -21C.0d. No solution
Answer:
D. No solution
Step-by-step explanation:
Hula ko lang
6. 10. Which of the following has - 3 and 7 as roots?a. x2 + 4x - 21 =0c. x2 - 4x + 21 = 0b. x2 - 4x - 21 = 0d. x2 + 4x + 21 = 0
Answer:
A
Step-by-step explanation:
Factor x²-4x-21=0
=(x-7) (x+3)
~x-7=0
x=7
~ x+3=0
x=-3
Answer:
b. x²-4x-21=0
Step-by-step explanation:
x=-3 x=7
x+3=0 x-7=0
(x+3)(x-7)=0
x²-7x+3x-21=0
x²-4x-21=0
7. 8. How do we write the quadratic equation whose roots are 7 and - 3?A. x2 - 4x + 21 = 0C, x2 + 4x - 21 = 0B. X- + 4x + 21 = 0D. x2 - 4x - 21 = 0
Answer:
D. x2-4x-21=0
Explanation:
7 and -3
x=7, x=-3
x-7=0, x+3=0
(x-7)(x+3)=0
x2-7x+3x-21=0
x2-4x-21=0
Answer:
D. x2 - 4x - 21 = 0
Explanation:
Since the roots are 7, and - 3
We can assume the equation to be,
(x-7) (x+3) = 0
Multiplying this we will get,
x2 - 4x - 21 = 0
8. What is the standard form of the equation (x+3) (x-7) = 0a. x²+4x+21=0b. x²-4x-21=0c. x²-10x-21=0d.x²+10x-21=0
Answer:
(x+3) (x-7)
x²-7x
__+3x -21
x² -4x -21 = the answer is B
9. 23. The roots of the equation are -7 or 3, what is the equation? a. x' + 4x - 21 = 0 b. x2 + 4x + 21= 0 C. x2 - 4x + 21 = 0d. x² -4× - 21= 0
Answer:
D po sagot
Step-by-step explanation:
thanks me later
10. How will you write the quadratic equation whose roots are 7 and-3? A. x² - 4x + 21 = 0 C. x² + 4x-21 = 0 B. x² + 4x + 21 = 0 D. x² - 4x 21 = 0 9.
Answer:
sagot diyan ay diko qlam
11. Which is NOT an example of Quadratic Inequality a. x² -4x -21 < 0b. x² -4x -21 > 0c. x² -4x -21 = 0d. x² -4x -21 ≥ 0
Answer:
LETTER C.
sana makatulong!!
Step-by-step explanation:
LETTER c. mga lodzsana maka tulong
12. 3x + 15x – 21 = 0? - 0
Answer:
9x
is rhe answer to your problem
Answer:
24×
Step-by-step explanation:
pa follow nalang
correct me if I'm wrong
13. 3. Which of the following has roots of --3 and 7?A. x2 - 4x - 21 = 0C. x2 + 4x + 21 = 0B. x2 + 4x - 21 = 0D. x2 - 4x + 21 = 0
Answer:
A
Step-by-step explanation:
Factor x²-4x-21=0
=(x-7) (x+3)
~x-7=0
x=7
~ x+3=0
x=-3
14. 1. Transform x(x-10)= -21 into aquadratic equation in the formof ax2+bx+c=0.A. X2-10x -21=0 VIOLETB.X2+10x + 21=0 REDC.x2-10x +21=0 SKY BLUE
Answer:
C.x2-10x +21=0
Step-by-step explanation:
x(x-10)= -21
x*x - x*10 = -21
x^2 - 10x + 21 = 0
x^2 - 10x + 21 = 0
std form
ax2+bx+c=0
x (x-10) = -21
x² - 10x = -21
x² - 10x+21 = -21 + 21
x²-10+21=0
answer: c
15. 5.) What is the standard form of the equation (x+3)(x - 7) = 0?a. x2 +4x +21=0 b. x2-10x - 21= 0 C. X2-4x -21 =0d. x2 +10x - 21= 0
Answer:
letter C i think thats the answer if you dont trust me its ok
16. How do we write the quadratic equation whose roots are 7 and - 3?A. x2 - 4x + 21 = 0C. x2 + 4x - 21 = 0B. x2 + 4x + 21 = 0D. x2 - 4x - 21 = 0
Answer:
C x²+4x-21
Explanation:
(x+7)(x-3)
using foil method
x²
7x
-3x
add up 7x and -3x you got 4x
multiply 7 and -3 you got -21(positive x negative=negative)
17. Find the quadratic equation whose sum and product of the roots are 4 and -21 respectively. x² - 4x - 21. = 0x² + 7x - 21 = 0x² - 4x + 21 = 0
Answer:
12
3
30
Step-by-step explanation:
3-4x-21=
3+7x-21=
3-4x+21=
18. Which of the following has roots of –3 and 7?A. a²+4a–21=0B. a²–4a+21=0C. a²–4a–21=0D. a²+4a+2a=0
Answer:
C. a²–4a–21=0
Step-by-step explanation:
[tex] {a}^{2} - 4a - 21 = 0 \\ (a + 3)(a - 7) = 0 \\ a = - 3 \: and \: 7[/tex]
19. 12. The product of the roots of a quadratic equation is 21. What couldbe the equation if one of its roots is -7?A. x2 - 10x - 21 = 0C. x2 - 10x + 21 = 0B. x2 + 10x + 21 = 0D. x2 + 10x - 21 = 0
the answer is x2+10x+21
because it's roots are -3 and -7
20. s2+4s-21=0[tex]s2 + 4s - 21 = 0[/tex]
s^2 + 4s - 21 =0
(s - 3)(s + 7) = 0
Roots: 3 and -7
21. B. 3x - 12x + 15 = 0D.• How do we write the quadratic equation whose roots are 7 and - 3?A. x2 - 4x + 21 = 0B. x2 + 4x + 21 = 0WhatC. x2 + 4x - 21 = 0D. x2 - 4x - 21 = 0
Answer:
x^2 - 4x - 21 = 0
Step-by-step explanation:
since the roots are 7, and -3
we can assume the equation to be,
(x-7) (x+3) = 0
multiplying this we will get,
x^2 - 4x -21 = 0
22. 3. Which of the following has roots of -3 and 7?A. x2 - 4x - 21 = 0C. x2 + 4x + 21 = 0B. x2 + 4x - 21 = 0D. x2 - 4x + 21 = 0
Answer:
the answer is letter b, it is the root of -3 and 7
Answer:
b
Step-by-step explanation:
sana makatulong sayo
23. 6) x2 + 4x − 21 = 0[tex]x2 + 4x - 21 = 0[/tex]
Answer:
We are going to solve it with Δ. The equation is of the form ax²+bx+c=0. a=1 b=4 c=−21. Δ=b²−4ac. Δ=4²−4⋅1⋅(−21)
Answer:
x = -7, 3
Step-by-step explanation:
x2 + 4x -21 =0
(x + 7)(x - 3) =0
x +7 = 0
x = -7
x-3 =0
x = 3
24. 2. The product of the roots of a quadratic equation is 21. What could be theequation if one of its roots is -7?A. - 10x -21 = 0C.X2 - 10x + 21 = 0B. x2 + 10x + 21 = 0D. x2 + 10% - 21 = 0
B. x2 + 10x + 21 = 0 yan ang sagot po
25. What is the standard form of the equation (x + 6)²= 15?A. x² - 12x -21 = 0B.X² + 12x - 21= 0 C. X² + 12x + 21 =0D. x² - 12x +21=0
Answer:
C
Step-by-step explanation:
You still need to expand the equation and transpose 15 to the ltherside
Answer:
C. x² + 12x + 21 = 0
Step-by-step explanation:
(x + 6)² = 15
x² + 6x + 6x + 36 = 15
x² + 12x + 36 = 15
x² + 12x + 36 - 15 = 0
x² + 12x + 21 = 0
STREAM I CAN'T STOP ME
26. 4. Find the Quadratic equation, whose roots are 3 and -7.a. X2 +10x -21=0c. X2-10x -21=0b. X2 +4x -21=0d. x2 - 4x +21=0
Answer:
b. x²+4x-21=0
Step-by-step explanation:
(x-3) (x+7)
x²+7x-3x-21
x²+4x-21
27. the product of the roots of aquadratic equation is 21.what could be the equation if one of its root ia -7?a.x²-10x-21=0b.x²+10x-21=0c.x²+10x+21=0d.x²-10x+21=0
Answer:
B.
Step-by-step explanation:
yan po yung sagot ko sana makatulong
28. the product of the roots of a quadratic equation is 21.what could be the equation if one it's roots is -7?A.x2+10x+21=0B.x2+10x+-21=0C. x3-10x+21=0D.x2-20x-21=0
Answer:
A. x² + 10x + 21 = 0
Step-by-step explanation:
x² + 10x + 21 = 0
(x + 7) (x + 3) = 0
x = -7 and x = -3
-7(-3) = 21
29. . If we put in 21 apples on the box and remove again the 21 apples? What will be the result if we add these representations? (-21)+(+21)=42 b. (+21)+(-21)=0 c. (-21)+(+21)=42 d. (+21)+(+21)=0
Answer:
B. (+21)+(-21)=0
Step-by-step explanation:
pa brainliest na lang po
Answer:
B
Step-by-step explanation:
kase you put a 21 apple so positive 21 tapos you remove so negative 21 thats why it should be represented as (+21)+(-21)=0
I HOPE NAKATULONG PA BRAINLIEST PO:^)
30. which of the following has roots of -3 and 7?a x²-4x-21=0b x²+4x-21=0c x²+4x+21=0dx²-4x+21=0
Answer:
Letter A
Explanation:
x=-3
x=7
Answer:
b x²+4x-21
Step-by-step explanation:
x²+4x-21
(x-3)(x+7)
