Asked by Karen

If (a,-3) is a point on the graph of y=x^2+4x, what is the value of a?

so far i have -3=x^2+4x

i can do the problem on my graphing calc but we can't use a graphing calc on the test so i need to know how to do it by hand. what do i do next?
Answered by Reiny
your equation would be
-3 = a^2 + 4a
a^2 + 4a + 3 = 0
(a+1)(a+3) = 0
a = -1 or a = -3
Answered by timtyy
hey baby wanna date?
There are no AI answers yet. The ability to request AI answers is coming soon!