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

Question

Solve for x.


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

A.) -3, -7


B.) -3, 7


C.) 3, -7


D.) 3, 7

Answer 1

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