Question

graph and show the solutions to x^2 -9=0

Answer 1

If you have the difference of two squares like x^2 - y^2, you can also represent them as
(x+y)(x-y)

Answer 2

So how else could you represent x^2 - 9?

Answer 3

x+3 and x-3

Answer 4

So now you have (x+3)(x-3) = 0 and its solutions will be values of x that make (x+3)(x-3) =0

Answer 5

so if i were to graph it it would be an upright parabola right

Answer 6

Yes. It would be a regular parabola moved down 9 units

Answer 7

ok :) thanks

Answer 8

Yup :)