Question

What is the value of the expression 1/2x squared - 2x - 3 when x = 4

Answer 1

The value of the expression 1/2x squared - 2x - 3 when x = 4​ would be -9

Step-by-step explanation:

According to the given data we have the following expression:

`(1)/(2)x-2x-3`

So to calculate the value of the expression above when x=4, we would have to plug the number 4 on the x and then solve the equation:

Therefore we would substitute the x with 4 in the equation as follows:

`(1)/(2)(4)-2(4)-3`

So, the result would be the following:

`\begin{gathered} (1)/(2)(4)-2(4)-3=2-8-3=-9 \\ \text{Therefore, the value of the expression }(1)/(2)x-2x-3\text{ when x=4 would be -9} \end{gathered}`

Therefore, the value of the expression 1/2x squared - 2x - 3 when x = 4​ would be -9