Answer
$q^{3}+8q^{2}-4q$
Work Step by Step
We are given the polynomial $2q^{3}+3q^{2}-4q-q^{3}+5q^{2}$.
We can use the distributive property to combine like terms.
$2q^{3}+3q^{2}-4q-q^{3}+5q^{2}=(2-1)q^{3}+(3+5)q^{2}-4q=(1)q^{3}+(8)q^{2}-4q=q^{3}+8q^{2}-4q$
