ОТВЕТ
ab - ac + yb - yc =
= a(b - c) + y(b - c) =
= (b - c)(a + y)
ab-ac+yb-yc=(ab-ac) +(yb-yc) =a(b-c) +y(b-c) =
(a+y) (b-c)
ОТВЕТ
ab - ac + yb - yc =
= a(b - c) + y(b - c) =
= (b - c)(a + y)
ab-ac+yb-yc=(ab-ac) +(yb-yc) =a(b-c) +y(b-c) =
(a+y) (b-c)