Question

5. If c = -1 and d = -2, what is the value of the expression 2c²d-3cd?a. -10b. -24c. 2d. 10e. -2

Answer 1

-10

Explanation:

Substitute variable values for variables.

`2(-1)^2(-2) - 3(-1)(-2)`

Simplify

2(1)(-2) - 6

-4 - 6

-10

Answer 2

Recall that to evaluate an expression at some given values, we substitute each variable with the corresponding given value.

Evaluating 2c²d-3cd at c=-1 and d=-2 we get:

`2(-1)^2(-2)-3(-1)(-2).`

Simplifying the above result we get:

`\begin{gathered} 2(1)(-2)-3(-1)(-2), \\ -4-6, \\ -10. \end{gathered}`

Answer: Option a.