Answer:
5 (-9x)
Step-by-step explanation:
Product of 5
5 * ()
difference of 9
5 * (-9)
and a number
5 * (-9x)
5(9 - x)
The product of 2 numbers, is just multiplication
But in this expression, we are multiplying a number by the difference of two other numbers, hence why we should group 9 - x in parentheses.
