Question 242936
{{{(-3x^6+3x^4-x^2)-(-x^6+2x^4+2x^2)}}} Start with the given expression.



{{{-3x^6+3x^4-x^2+x^6-2x^4-2x^2}}} Distribute



{{{(-3x^6+x^6)+(3x^4-2x^4)+(-x^2-2x^2)}}} Group like terms.



{{{-2x^6+x^4-3x^2}}} Combine like terms.



So {{{(-3x^6+3x^4-x^2)-(-x^6+2x^4+2x^2)=-2x^6+x^4-3x^2}}}