What the r the factors of this expression. 4(5b-3)^2+10(5b-3)-6. plz explain all steps to this answer and thanks :)

Answer 1

let 5b-3 = x, then we have
4x^2 + 10x - 6
= 2(2x^2 + 5x - 3)
= 2(x+3)(2x-1)

replace x with 5b-3 within each bracket , then simplify

Answer 2

So is the final answer 2(5b)(10b-4) then ?

Answer 3

(10b)(10b-7)