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 = 4 and z = 7, what is the value of a(a - z)?
| -12 | |
| 162 | |
| 90 | |
| -36 |