Question

Разложите на множители:
1)7m-n+49m^2 - n^2
2)4x^2 - 4xy+y^2 - 16
3)xy^4 - 2y^4 - xy - y^2
4)9-x^2 - 2xy-y^2

Answer 1

1. (7m-n)+(7m-n)*(7m+n)
2. 4x(x-y)+ (y-4)*(y+4)
3. y(xy^3-2y^3-x-y^2)