Question

if a+1/a=5 find value of a^2+1/a^2​

Answer 1

Answer:

23

Step-by-step explanation:

$a + \frac{1}{a} = 5 \\ \\ {(a + \frac{1}{a} })^{2} = 25 \\ \\ {a }^{2} + {( \frac{1}{a} )}^{2} = 25 - 2 \\ = 23$