Question

if X+1/x=5,then calculate the value of x²+1/x²
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Answer 1

Answer:

23

Step-by-step explanation:

we should do both side square

ie. (x+1/x)^2=(5)^2

x^2+2*x*1/x+1/x^2=25

x^2+1/x^2=25-2

x^2+1/x^2 = 23

therefore the value of x^2+1/x^2=23