1) 56ab - 1 - 7b + 8a = (8a - 1)(7b + 1)
2) 6xy + ab - 2bx - 3ay = (2x - a)(3y + b)
3) xy² - by² - ax + ab + y² - a = (x + y)(y - b)(x - a)
1) 56ab - 1 - 7b + 8a = (8a - 1)(7b + 1)
2) 6xy + ab - 2bx - 3ay = (2x - a)(3y + b)
3) xy² - by² - ax + ab + y² - a = (x + y)(y - b)(x - a)