Question

Evaluate the expression when x = 5 and z = 7.z^2 - x----------z + 3xSimplify your answer as much as possible.

Answer 1

The Solution:

Given:

`\begin{gathered} (z^2-x)/(z+3x) \\ \\ \text{ Where }x=5,\text{ and }z=7 \end{gathered}`

We are asked to simplify as much as possible.

`(7^2-5)/(7+3(5))=(49-5)/(7+15)=(44)/(22)=(2)/(1)=2`

Therefore, the correct answer is 2.