k9lvin
k9lvin k9lvin
  • 19-02-2022
  • Mathematics
contestada

Select the correct answer.
Solve for x.

x2 + 4x - 21 = 0
A.
-3, -7
B.
-3, 7
C.
3, -7
D.
3, 7

Respuesta :

iqalilcrybaby iqalilcrybaby
  • 19-02-2022
i bet the equation is x²+4x-21=0
factorise
(x+7)(x-3)=0
x+7=0 , x-3=0
x=-7, x=3
the answer is C
Answer Link

Otras preguntas

Which of the following is algebraically equivalent to the sum of 4x^2 -8x +7 And 3x^2-2x-5
Which worldview includes both living and nonliving components, stating that both have a right to exist?
Sensory restriction is much more likely to hinder visual development in early infancy than during other times of life. this suggests that there is a(n) ________
A certain shade of blue has a frequency of 7.05 × 1014 hz. What is the energy of exactly one photon of this light?
What was the Black Panther Party
in a chemical equation, what symbol is used to show that a chemical reaction goes in both reaction
the quotient when a number b is divided by nine, decreased by seven
The _______________ continental congress assumed the powers of a central government, organized an army and navy, made plans to issue money, and appointed george
how to solve math word problems
How would I do part A. I showed my work but I'm slightly off