Okay the trinomial is: 8x^2-18+9
So I'm doing group factoring because I think it's the easiest. I multiplied 8x9=72
So I need 2 factors of 72 that add up to -18, correct? The two numbers are 6 and 12
My question is, if the numbers aren't prime, they aren't completely factored down, so does this matter? How do I continue factoring the trinomial?
Thank you.
So I'm doing group factoring because I think it's the easiest. I multiplied 8x9=72
So I need 2 factors of 72 that add up to -18, correct? The two numbers are 6 and 12
My question is, if the numbers aren't prime, they aren't completely factored down, so does this matter? How do I continue factoring the trinomial?
Thank you.
-
8x^2-18x+9
8x^2-12x-6x+9
4x(2x-3)-3(2x-3)
(4x-3)(2x-3)
8x^2-12x-6x+9
4x(2x-3)-3(2x-3)
(4x-3)(2x-3)