If a + 1/a = 3 then the value of (a² + 1/a²) is
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Here, a² + 1/a² = (a+1/a)²-2a.1/a
= 3²-2
= 9-2
= 7 Ans.
Answered by
0
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
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