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 = -2 and x = -1, what is the value of -9b(b - x)?
| -18 | |
| 432 | |
| -192 | |
| -72 |