当0<x<1是,化简:平方根(x四次方-2x三次方+x²)
问题描述:
当0<x<1是,化简:平方根(x四次方-2x三次方+x²)
答
✓(x^4-2x^3+^2)
=✓x^2(x-1)^2
=x(1-x)
=x-x^2