If a+1/a=3 then find a²+1/a²=?
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Answer -
a+1/a = 3 -----(1)
a²+1/a² = ?
By doing square of equation 1
(a+1/a)² = 9
a² + 1/a² + 2 × a × 1/a = 9
a² + 1/a² + 2 = 9
a² + 1/a² = 9-2
a² + 1/a² = 7 Ans.
Answered by
1
a+1/a = 3 -----(1)
a²+1/a² = ?
By doing square of equation 1
(a+1/a)² = 9
a² + 1/a² + 2 × a × 1/a = 9
a² + 1/a² + 2 = 9
a² + 1/a² = 9-2
a² + 1/a² = 7 Ans.
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