Answer
$-2ab^{2}+20a^{2}b$
Work Step by Step
We are given the polynomial $3ab^{2}+7a^{2}b-5ab^{2}+13a^{2}b$.
We can use the distributive property to combine like terms.
$3ab^{2}+7a^{2}b-5ab^{2}+13a^{2}b=(3-5)ab^{2}+(7+13)a^{2}b=(-2)ab^{2}+(20)a^{2}b=-2ab^{2}+20a^{2}b$
