SOLUTION: If (a,-12) is a point on the graph of y=x^2+7x, what is a?

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Question 705005: If (a,-12) is a point on the graph of y=x^2+7x, what is a?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
y=x^2+7x

-12=a^2+7a

0=a^2+7a+12

a^2+7a+12 = 0

(a+4)(a+3) = 0

a+4=0 or a+3=0

a=-4 or a=-3

Answer: a=-4 or a=-3

Therefore, the points on y=x^2+7x are (-4, -12) and (-3, -12)