Bentuk sederhana dari[tex]x^-2 ( \sqrt{x} - \sqrt[4]{x^9} )[/tex] adalah

x^-2 (√x - ^4√x^9)

= x^-2 (x^1/2 - x^9/4)

= x^-2+1/2 - x^-2+9/4

= x^-3/2 - x^1/4

= 1/x^3/2 - ^4√x

= 1/x√x - ^4√x