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Solve for x. x^(2) + 4x - 21 = 0 A.) -3, -7 B.) -3, 7 C.) 3, -7 D.) 3, 7
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3 votes
Solve for x.


x^(2) + 4x - 21 = 0

A.) -3, -7


B.) -3, 7


C.) 3, -7


D.) 3, 7

User Guillem Xercavins
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1 Answer

5 votes
The answer is C. When using the magic X and then you have to set it up into a math equation which is X+7=0 and X-3=0 the 7 becomes negative and the 3 becomes positive
User School
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