6(x-3)²-24=?
问题描述：
6(x-3)²-24=?
答
6(x-3)²-24
=6（x^2+9-6x)-24
=6x^2-36x+54-24
=6x^2-36x+30
=6(x^2-6x+5)
=6(x-1)(x-5)