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 c = -9 and x = -1, what is the value of 9c(c - x)?
| 648 | |
| -96 | |
| -64 | |
| -216 |