if a² + 1/a² = 23 , find the value of (a + 1/a)
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answer is 5 I hope it helps u
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a^2 + 1/a^2 =23 , applying a^2 + b^2 formula
(a +1/a)^2 -2*a*1/a =23
(a +1/a)^2 -2 =23
(a + 1/a)^2 =23 +2
(a + 1/a)^2 =25
a + 1/a = +5 or -5
(a +1/a)^2 -2*a*1/a =23
(a +1/a)^2 -2 =23
(a + 1/a)^2 =23 +2
(a + 1/a)^2 =25
a + 1/a = +5 or -5
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