因式分解:(y+2)xˇ2+(y+2)x-12y-24

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因式分解:(y+2)xˇ2+(y+2)x-12y-24因式分解:(y+2)xˇ2+(y+2)x-12y-24因式分解:(y+2)xˇ2+(y+2)x-12y-24:(y+2)xˇ2+(y+2)x-12

因式分解:(y+2)xˇ2+(y+2)x-12y-24
因式分解:(y+2)xˇ2+(y+2)x-12y-24

因式分解:(y+2)xˇ2+(y+2)x-12y-24
:(y+2)xˇ2+(y+2)x-12y-24
=(y+2)x²+(y+2x)-12(y+2)
=(y+2)(x²+x-12)
=(y+2)(x+4)(x-3)

:(y+2)xˇ2+(y+2)x-12y-24 =:(y+2)xˇ2+(y+2)x-12(y+2 )=(y+2)(x^2+x-12)=(y+2)(x+4)(x-3)

设t=y+2,则
原式=txˇ2+tx-12t
这下就容易看出来了
原式=(x-3)*(tx+4t)
再带回
原式=(x-3)*(x+4)*(y+2)