How do you factor y2 2y-8?

Answer 1

If that's + 2y, the answer is (y + 4)(y - 2)

Answer 2

I feel like there is something wrong with your question because subtracting y2 on both sides leaves you with 8y=0; then, y=0

Answer 3

8y2-10y-3

8y2-12y+2y-3

4y(2y-3)+1(2y-3)

(4y+1)(2y-3)

Answer 4

4(2y-3)