9. If X+1/X=10, find the value of x^2+1/x^2=
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98
Step-by-step explanation:
x+1/x=10
(x+1/x)² =x²+1/x²+2
therefore,
(10)²= x²+1/x²+ 2
100= x²+1/x²+2
x²+1/x²=100-2
=98
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