Question

3х^2-6xm-9m^2   _   разложить на множители

Answer 1

3х^2-6xm-9m^2=3x^2+3xm-9xm-9m^2=3x(x+m)-9m(x+m)=(x+m)(3x-9m)=3(x-3m)(x+m)

Answer 2

3х^2-6xm-9m^2=3(x-3m)(x+m)