Question

Разложите на множители. а)6mn+6m б)12by-9b в)15ax+20bx г)7y+21y д)4x(z-1)-(1-x) е)y(2-x)+9(x-2) ж)5(a-b)+y(b-a)

Answer 1

A) = 6m*(n + 1)
б) = 3b(4y - 3)
в) = 5x(3a + 4b)
г) = 7y(1 + 3)
д) = ?
е) = у(2-х) - 9(2-х) = (у - 9)(2 - х)
ж) = 5(a - b) - y(a - b) = (5 - y)(a - b)

Answer 2

а) 6mn + 6m = 6m(n + 1)

б) 12by - 9b = 3b(4y - 3)

в) 15ax + 20bx = 5(3ax + 4bx)

г) 7y + 21y = 28y = 4 * 7y

д) 4x(z - 1) - (1 - x) = 4x(z - 1) - 1 + x = 4x(z - 1) + x - 1 = x(4(z - 1) + 1) - 1 = x(4z - 3) - 1

е) y(2 - x) + 9(x - 2) = -y(x - 2) + 9(x - 2) = (x - 2)(9 - y)

ж) 5(a - b) + y(b - a) = (5 - y)(a - b)