Question

what is the value of 6/x + 2x to the second power when the x=3

Answer 1

Given expression :

$\frac{6}{x}+2x^2$

We have to find the value of expression at x =3

Substitute x =3 in the given expression:

$\begin{gathered} \frac{6}{x}+2x^2 \\ at\text{ x= 3} \\ \frac{6}{3}+2(3)^2 \\ 2+2(9) \\ 2+18 \\ 20 \\ \text{ So, at x =3 the }\exp ression\frac{6}{x}+2x^2=20 \end{gathered}$

ANswer : 20