方法一:
1 1
6 -18
6x^2-12x-18=(x+1)(6x-18)
方法二:
2 2
3 -9
6x^2-12x-18=(2x+2)(3x-9)
方法三:6x^2-12x-18=6(x^2-2x-3)
1 1
1 -3
6x^2-12x-18=6(x+1)(x-3)
方法一:
1 1
6 -18
6x^2-12x-18=(x+1)(6x-18)
方法二:
2 2
3 -9
6x^2-12x-18=(2x+2)(3x-9)
方法三:6x^2-12x-18=6(x^2-2x-3)
1 1
1 -3
6x^2-12x-18=6(x+1)(x-3)