分解因式:(x+2)(x+4)+x²-4

2024-12-04 04:30:15
推荐回答(4个)
回答1:

(x+2)(x+4)+x²-4
=x²+6x+8+x²-4
=2x²+6x+4
=2(x²+3x+2)
=2(x+1)(x+2)

回答2:

(x+2)(x+4)+x²-4
=(x+2)(x+4)+(x_2)(x+2)
=(x+2)(x+4+x-2)
=(x+2)(2x+2)
=2(x+2)(x+1)

回答3:

(x+2)(x+4)+x²-4
=(x+2)(x+4)+(x+2)(x-2)
=(x+2)[(x+4)+(x-2)]
=(x+2)(2x+2)
=2(x+2)(x+1)

回答4:

(x+2)(x+4)+x²-4
=(x+2)(x+4)+(x+2)(x-2)
=(x+2)(x+4+x-2)
=(x+2)(2x+2)
=2(x+2)(x+1)