На множители : а)a-b+2c(a-b) б)by-3b+2cy+6c в)kl-5l-k+5 г)3ab-2ac+4cd-6bd д)y^2-2by+6b-3y

1) а-b+2c(a-b) = a-b+2ca-2cb = a(1+2c)-b(1+2c) =
(a-b)(1+2c)

2) by-3b+2cy+6c = b(y-3)+2c(y+3) = (b+2c)(y²-9)

3) kl-5l-k+5 = k(l-1)-5(l-1) = (k-5)(l-1)

4) 3ab-2ac+4cd-6bd = 3b(a-2d)-2c(a-2d) = (3b-2c)(a-2d)

5) y²-2by+6b-3y = y(y-3)-2b(y-3) = (y-2b)(y-3)