根号[(x^4)y+(x^2)(y^3)-(2x^3)(y^2)] 其中y>x>0
问题描述:
根号[(x^4)y+(x^2)(y^3)-(2x^3)(y^2)] 其中y>x>0
化简
答
=根号[(x^2)y(x^2+y^2-2xy)]=根号[(x^2)y(y-x)^2]=x(y-x)根号[y]
根号[(x^4)y+(x^2)(y^3)-(2x^3)(y^2)] 其中y>x>0
化简
=根号[(x^2)y(x^2+y^2-2xy)]=根号[(x^2)y(y-x)^2]=x(y-x)根号[y]