计算:【x-2】【x+4】分之x²+4x-x²-4分之x+2=

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计算:【x-2】【x+4】分之x²+4x-x²-4分之x+2=

计算:【x-2】【x+4】分之x²+4x-x²-4分之x+2=
计算:【x-2】【x+4】分之x²+4x-x²-4分之x+2=

计算:【x-2】【x+4】分之x²+4x-x²-4分之x+2=
原式=x(x+4)/(x-2)(x+4)-(x+2)/(x+2)(x-2)
=x/(x-2)-1/(x-2)
=(x-1)/(x-2)

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