If m (x) = x2+3 and n (x) = 5x+9 which expression is equivalent to (mn) (x)

mn (x) = 5x³ + 9x² + 15x + 27

Step-by-step explanation:

mn (x) = m (x) * n (x)

mn (x) = (x² + 3) (5x + 9)

We can evaluate this expression by using the FOIL method.

First terms: x² * 5x = 5x³

Outer terms: x² * 9 = + 9x²

Inner terms: 3 * 5x = + 15x

Last terms: 3 * 9 = + 27

mn (x) = 5x³ + 9x² + 15x + 27