Use the disributive property to multiply5 (x-9)

Distribute the parenthesis using > a (b + c) = ab + ac > 5x + 5 (-9) > Apply the minus - plus rules > + (-a) = - a > 5x - 5 * 9 5x - 45

If you are multiply 5 (x+9), then you are essentially multiplying 5 (x) and 5 (9).

The parenthesis just mean multiply.

5 times x equals 5x

5 times 9 equals 45

Because you are subtracting x and 9 in the parenthesis, you're expression would look like this:

5x-45

So, 5x-45 = 5 (x-9)

The expression is 5x-45