Question

x²+6x+5分之x²+7x+10乘x²＋4x＋4分之x的3次方＋1乘x-2分之x

Answer 1

x²+6x+5分之x²+7x+10×x²＋4x＋4分之x的3次方＋1÷x-2分之x²-x＋1

=[(x+2)(x+5)/(x+1)(x+5)]×[(x+1)(x²-x+1)/(x+2)²]÷[(x²-x+1)/(x-2)]

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