Question

x+1/x=3 then x²+1/x²=?
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Answer 1

Answer:

7

Step-by-step explanation:

x+1/x=3

now squaring both the sides,(using (a+b)^2= a^2 + b^2 + 2ab)

x^2 + 1/x^2 + 2=9

so, x^2 + 1/X^2 = 7