if x+1/x=7 find the value of x^2+1/x^2
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Answer:47
Step-by-step explanation:
x+1/x=7
Squaring both sides
(x+1/x)^2=7^2
x^2+1/x^2+2(x)(1/x)=49
x^2+1/x^2+2=49
x^2+1/x^2=49-2
x^2+1/x^2=47
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