6(x-3)²-24=?

6(x-3)²-24=?
6(x-3)²-24=?

6(x-3)²-24=?
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)

6(x-3)²-24
=6(x-3+2)(x-3-2)
=6(x-1)(x-5)

6(x-3)²-24
解，得：
==6[(x-3)^2-4]
==6[(x-3)+2]*[(x-3)-2]
==6(x-3+2)(x-3-2)
==6(x-1)(x-5)