How do you factor 9x squared-18?

Answer 1

I hope you mean x3+2x2-9x+18.

Treat the equation like two equations: x3+2x2 and 9x+18.

Factor out x2 from the first equation, so x2(x+2). Factor out 9 from the second equation, so 9(x+2).

Now, the whole equation. x2(x+2)-9(x+2).

Factor out (x+2), so (x+2)(x2-9).

(x2-9) factors into (x+3)(x-3).

So, (x+2)(x+3)(x-3) is the complete factorization.

Hope this helps.

Answer 2

9(x2 - 2)