Question

两道八年级分解因式题

m²(m-n)²-4(n-m)²
x(x+y)(x-y)-x(x+y)²

Answer 1

m²(m-n)²-4(n-m)²
=m^2(m-n)^2-4(m-n)^2
=(m-n)^2(m^2-4)
=(m-n)^2(m+2)(m-2)

x(x+y)(x-y)-x(x+y)²
=x(x+y)[(x-y)-(x+y)]
=x(x+y)(-2y)
=-2xy(x+y)