Question

Разложите на множители: 1)a^2+4b^2-9c^2-4ab 2) x^3+x^2-xy^2-y^210ballov

Answer 1

1) a²-4*a*b+4*b²-9*c²=(a-2*b)²-9*c²=(a-2*b+3*c)*(a-2*b-3*c)

2) x³+x²-x*y²-y²=x²*(x+1)-y²*(x+1)=(x²-y²)*(x+1)=(x+y)*(x-y)*(x+1)