Question

PLS HELP ME ITS URGENT!!!!!

Answer 1

Answer:

x²+1/x² = 51

Explanation:

Given x + 1/x = 7 ---(1)

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We know the algebraic identity:

a²+b²+2ab = (a+b)²

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Now,

x²+1/x²

= (x-1/x)²+2*x*(1/x)

= (x-1/x)²+2

= 7²-2 [ from (1)]

= 49-2

= 47

Therefore,

x²+1/x² = 47