When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
If b = 3 and x = 9, what is the value of 4b(b - x)?
| -18 | |
| -72 | |
| 504 | |
| -324 |