计算:x(x^2+x-1)-(x^2-x+1)
问题描述:
计算:x(x^2+x-1)-(x^2-x+1)
答
=x³+x²-x-x²+x-1
=x³-1
计算:x(x^2+x-1)-(x^2-x+1)
=x³+x²-x-x²+x-1
=x³-1