Question 644263
{{{3x-9+8x^2-x+x^5+x^4-3x^5}}} Start with the given expression



{{{(x^5-3x^5)+(x^4)+(8x^2)+(3x-x)+(-9)}}} Group like terms



{{{-2x^5+x^4+8x^2+2x-9}}} Combine like terms



So {{{3x-9+8x^2-x+x^5+x^4-3x^5}}} simplifies to {{{-2x^5+x^4+8x^2+2x-9}}}



In other words, {{{3x-9+8x^2-x+x^5+x^4-3x^5=-2x^5+x^4+8x^2+2x-9}}} for all values of x