Question

a^5+a^4+a^3+2a^2+2a+2

Answer 1

问：a^5+a^4+a^3+2a^2+2a+2

答：你好！亲亲您要的解答原式分子=a^3(a^2+a-2)-(a^2+a-2)=（a^3-1)(a^2+a-2)=(a-1)(a^2+a+1)(a^2+a-2)因为你已经算出a^2+a-1=0故a^2+a=1所以原式分子=（a-1)(1+1)(1-2)=-2(a-1)原式分母=a(a+1)(a-1)=(a^2+a)(a-1)=1*(a-1)所以原式=-2