Question

if x + 1/x = sqrt(7) , then write the value of x ^ 2 + 1/(x ^ 2)​

Answer 1

Step-by-step explanation:

${x}^{2} + \frac{1}{ {x}^{2} } \\ = {(x)}^{2} + {( \frac{1}{x} )}^{2} \\ = {(x + \frac{1}{x} )}^{2} - 2 \times x \times \frac{1}{x} \\ = {(\sqrt{7)}}^{2} - 2 \\ = 7 - 2 \\ = 5$

OM NAMAH SHIVAYA

Debasish Biswal