Question

solve this please......​

Answer 1

Solution

$x {}^{2} + \frac{1}{x {}^{2} } = 3 \\ = > (x + \frac{1}{x} ) {}^{2} - 2 \times x \times \frac{1}{x} = 3 \\ = > (x + \frac{1}{x} ) {}^{2} - 2 = 3 \\ = > (x + \frac{1}{x} ) {}^{2} = 5 \\ = > x + \frac{1}{x} = \sqrt{5}$

hope this helps you