Question

Plz Help me

15x^2 -10x-40
How do you factor?

Answer 1

5(3x+4)(x-2)

Explanation:

first you factor out a five to make it 3x^2 - 2x - 8

then you split into (3x+?) and (x+?)

then using guess and check (this is not the best method but I use it) you get

(3x+4)(x-2) and then you bring the 5 so its 5(3x+4)(x-2)