672. Разложите на множители: а) 8m(a-3)+n(a-3); б) (p²-5)-q(p²-5); в) x(y-9)+y(9-y); г) 7(c+2)+(c+2)²; д) (a-b)²-3(b-a); е) -(x+2y)-4(x+2y)².

а) 8m(a - 3) + n(a - 3) = (a - 3)(8m + n) б) (p² - 5) - q(p² - 5) = (p² - 5)(1 - q) в) x(y - 9) + y(9 - y) = x(y - 9) - y(y - 9) = (y - 9)(x - y) г) 7(c + 2) + (c + 2)² = (c + 2)(7 + c + 2) = (c + 2)(c + 9) д) (a - b)² - 3(b - a) = (a - b)² + 3(a - b) = (a - b)(a - b + 3) е) -(x + 2y) - 4(x + 2y)² = -(x + 2y)(1 + 4(x + 2y)) = -(x + 2y)(1 + 4x + 8y)