Question

if a+1/a=7, find the value of a^2+1/a^2.

Answer 1

Answer:

Step-by-step explanation:

given, a+1/a = 7

( a+1/a)^2 = 7^2  (  squaring both sides)

a² + 1/a² + 2 = 49  ( a+b)²= a² + b² + 2ab

a² + 1/a² = 49-2=47

hope you understand