初二数学(x+2)^2+2(x+2)(x-2)-3(x+2)(x-1)

2026-05-19 16:22:21
推荐回答(4个)
回答1:

首先题一个公因式(X+2),然后化简,最后结果则为x+2 。
过程:(x+2)^2+2(x+2)*(x-2)-3(x+2)(x-1)
=(x+2)^2+(x+2)*(2x-4)-(x+2)(3x-3)
=(X+2)(X+2+2X-4-3X+3)
=(x+2)*1
=X+2

回答2:

(x+2)²+2(x+2)(x-2)-3(x+2)(x-1)
=(x+2)[(x+2)+2(x-2)-3(x-1)]
=(x+2)(x+2+2x-4-3x+3)
=(x+2)*1
=x+2

回答3:

(x+2)^2+2(x+2)(x-2)-3(x+2)(x-1)
=(x+2)[(x+2)+2(x-2)-3(x-1)]
=(x+2)(x+2+2x-4-3x+3)
=x+2

回答4:

x+2