Question

因式分解x^3-4x^2y x^3+2x^2+x和分解因式4a^2-1 m^2+n^2+2mn-p^2

Answer 1

x^3-4x^2y

=x²(x-4y)

x^3+2x^2+x

=x(x²+2x+1)

=x(x+1)²

4a²-1=(2a+1)(2a-1)

m²+n²+2mn-p²

=(m+n)²-p²

=(m+n+p)(m+n-p)