Question

If a + 1/a = 3 then the value of (a² + 1/a²) is​

Answer 1

Here, a² + 1/a² = (a+1/a)²-2a.1/a

= 3²-2

= 9-2

= 7 Ans.

Answer 2

Step-by-step explanation:

a+1/a=3

squaring on both sides

(a+1/a)^2=3^2

a^2+2×a×1/a+1/a^2=9

a^2+2+1/a^2=9

a^2+1/a^2=9-2

a^2+1/a^2=7