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Select the correct answer. Solve for x. x2 + 4x - 21 = 0 A. -3, -7 B. -3, 7 C. 3, -7 D. 3, 7
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14 votes
Select the correct answer.

Solve for x.

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

User Lee Hinde
by
8.1k points

1 Answer

4 votes
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
User Dlaser
by
8.7k points
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