(x-2分之3x-x+2分之x)乘x分之x²-4

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(x-2分之3x-x+2分之x)乘x分之x²-4(x-2分之3x-x+2分之x)乘x分之x²-4(x-2分之3x-x+2分之x)乘x分之x²-4[(x-2)分之3x-(x

(x-2分之3x-x+2分之x)乘x分之x²-4
(x-2分之3x-x+2分之x)乘x分之x²-4

(x-2分之3x-x+2分之x)乘x分之x²-4
[(x-2)分之3x -(x+2)分之x]乘 x分之(x²-4)
=[(x-2)分之3x ]乘 x分之(x²-4)- [(x+2)分之x]乘 x分之(x²-4)
=3(x+2) - (x-2)
=3x+6-x+2
=2x+8
=2(x+4)