Question

If x=3+√8,thenfind the value of x3+1/2 x3.

Answer 1

`(27)/(2) +9√(2)`; 26.22792

Explanation:

Assuming you mean find the value of
`3x+(1)/(2)(3x)` (please format your question correctly)...

The question has told you the x value or rather some numerical values. Just like for every other equation, replace x with its numerical value.

`3(3+√(8))+(1)/(2)(3(3+√(8) ))`

This question is best suited to use a calculator as doing this on paper is absolutely necessary.

Putting this in the calculator you should get:
`(27)/(2) +9√(2)` or 26.22792