Question 132302
{{{((3/10)x^3-(1/4)x-1/8)-((1/10)x^3+(1/4)x-1/8)}}} start with the given expression



{{{(3/10)x^3-(1/4)x-1/8-(1/10)x^3-(1/4)x+1/8}}} distribute the negative



{{{((3/10)x^3-(1/10)x^3)+(-(1/4)x-(1/4)x)+(-1/8+1/8)}}} group like terms



{{{(2/10)x^3-(2/4)x+0/8}}} combine like terms



{{{(1/5)x^3-(1/2)x}}} reduce and simplify



So {{{((3/10)x^3-(1/4)x-1/8)-((1/10)x^3+(1/4)x-1/8)}}} simplifies to {{{(1/5)x^3-(1/2)x}}}



In other words, {{{((3/10)x^3-(1/4)x-1/8)-((1/10)x^3+(1/4)x-1/8)=(1/5)x^3-(1/2)x}}}