Question

Разложите на множители
a) 3(7-y)+y(7-y)
b). 4x-4y+x^2-xy
c). y^3-4y

Answer 1

1) 21+4y-y^2
2) (x-y)(4+x)
3) y(y+2)(y-2)

Answer 2

Ответ:

a) (7-y)*(3+y)

b) (x-y)*(4+x)

c) y*(y-2)*(y+2)