(3х-1)в квадрате(8b+1)-(7b-3)(1-3х)

Question

(3х-1)в квадрате(8b+1)-(7b-3)(1-3х)

Answer 1

(9x^2-6x+1)(8b+1)-7b+21bx+3+9x=72x^2b+9x^2-48bx-6x+8b+1+-7b+21bx+3+9x=72x^2b+9x^2-37bx+3x+b+4