Question

x(x + 8) = 9

Answer 1

What is the value of \[b^2 - 4ac\] for the following equation?

Answer 2

First we distribute the x to get
x^2 +8x = 9

Then to convert to ax^2 +bx + c
we must subtract 9 from both sides
x^2+8x-9=0

now we can find b^2-4ac

(8)^2 - 4(1)(-9) =

Answer 3

Oh man, i got a hundred for my answer :3