а) 2x(a-b) + a(a-b) = 2x(a-b) + a(a-b) = (2x + a)(a-b)
б) 3x + 3y - bx - by = 3(x + y) - b(x + y) = (3 - b)(x + y)
а) 2x(a-b) + a(a-b) = 2x(a-b) + a(a-b) = (2x + a)(a-b)
б) 3x + 3y - bx - by = 3(x + y) - b(x + y) = (3 - b)(x + y)