Question

find the squre in question in the image

​

Answer 1

Answer:

The answer is 51

Step-by-step explanation:

Given $x-\frac{1}{x}=7$

Square both sides,

$\Rightarrow x^2+\frac{1}{x^2}-2(x)(\frac{1}{x})=7^2$

$\Rightarrow x^2+\frac{1}{x^2}-2=49\\\therefore x^2+\frac{1}{x^2}=49+2=51$