if a-1/a=5 then what is the value of a^2+1/a^ is
pls solve this
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27
Step-by-step explanation:
a - 1/a = 5
Take squaring both side
(a - 1/a)^2 = (5)^2
a^2 + 1/a^2 - 2.a.1/a = 25
a^2 + 1/a^2- 2 = 25
a^2 + 1/a^2 = 27
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=> a^2+1/a^2 = 27
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