Question

(x^1/2 -x) -(2x^3 -x^1/2 - x)

Answer 1

`\left(x^(\tfrac 1 2) -x \right) - \left( 2x^3 - x^(\tfrac 12) -x \right)\\\\=x^(\tfrac 12) -x-2x^3 + x^(\tfrac 12) +x\\\\=2x^(\tfrac 12) -2x^3\\\\=2\left(x^(\tfrac 12) - x^3 \right)`