Question

初中 数学题 分解因式

m(m+15)+36

x3-6x2+12x-8

x3-x2y-xy2+y3

能简便就简便 谢谢

Answer 1

m(m+15)+36
＝m^2+15m+36
=(m+3)(m+12)

X^3-6X^2+12X-8
=(X^3-8)-6x(x-2)
=(x-2)(X^2+2x+4)-6x(x-2)
=(x-2)(X^2-4x+4)
=(x-2)^3

x^3-x^2y-xy^2+y^3
=x^2(x-y)-y^2(x-y)
=(x-y)(x^2-y^2)
=(x+y)(x-y)^2