Question

Разложите на множители:
7x^2 - 7y^2
4m^3 - 4mn^2
5x^2 - 20y^2
a^3b - ab^3

Answer 1

7x^2 - 7y^2=7(x-y)(x+y)
4m^3 - 4mn^2=4m(m-n)(m+n)
5x^2 - 20y^2=5(x-2y)(x+2y)
a^3b - ab^3=ab(a-b)(a+b)