Разложите на множители многочлен:а) b^3 2b^2 + bв) 3а +

A) b - 2b2 + b = b(b - 2b + 1)
 
в) 3a + 3b - ax - bx = (3a + 3b) - (ax + bx) = 3(a + b) - x(a + b) = (a + b)(3 - x)

д) 7a - 7b + 2b - 2ab = (7a - 7b) + (2b - 2ab) = 7(a - b) + 2b(b - a) =
= 7(a - b) - 2b(a - b) = (a - b)(7 - 2b)

б) ab + 2ab + ab = ab(b + 2ab + a) = ab(a + b) = ab(a + b)(a + b)

г) 5a - b + 5a - ab = (5a - b) + (5a - ab) = (5a-b) + a(5a - b) =
= (5a - b)(1 + a)

е) b - b + 4b + 4 = (b - b)+ (4b + 4) = b(b - 1) + 4(b + 1) =
= b(b - 1)(b + 1) + 4(b + 1) = (b + 1)(b - b + 4)