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 a = 3 and x = 6, what is the value of -a(a - x)?
| 64 | |
| 0 | |
| 9 | |
| 72 |