# How do you simplify 2.4a^2b^2 + 3.2ab^2 - 1.3 a^2b^2?

Two terms in an equation are like terms If they share the same variable/variables. In this case, we have $2.4 {a}^{2} {b}^{2}$ and $- 1.3 {a}^{2} {b}^{2}$. Both have the variables ${a}^{2} {b}^{2}$, so we can combine them. Let's subtract the coefficients only so the variables don't confuse us: $2.4 - 1.3 = 1.1$. We can now add the variables back in: $1.1 {a}^{2} {b}^{2}$. We now have our answer, $1.1 {a}^{2} {b}^{2} + 3.2 a {b}^{2}$.