## Precalculus: Mathematics for Calculus, 7th Edition

The commutative property states that ab = ba. If we work out the expression 4(2 + 3) = (2 + 3)4, we get that 4(5) = (5)4, which later becomes 20 = 20. We get the same result if we solve in the following way: 4 $\times$ 2 + 4 $\times$ 3 = 2 $\times$ 4 + 3 $\times$ 4 8 + 12 = 12 + 8 20 = 20