Разложите ** множители: а) 3с² - cy; b) 16c² - 49; c) 5x-5y-c(x-y)

Question

Разложите на множители:
а) 3с² - cy;
b) 16c² - 49;
c) 5x-5y-c(x-y)

Answer 1

a) 3c^2-cy=c(3c-y)
b) 16c^2-49=(4c-7)(4c+7)
c)5x-5y-c(x-y)=5x-5y-cx+cy=5x-cx+cy-5y=x(5-c)+y(c-5)=x(5-c)-y(5-c)=(5-c)(x-y)

Answer 2

А) c(3c-y)
b) (4c-7)(4c+7)
c) 5(x-y)-c(x-y) = (5-c)(x-y)