if x is equal to 5 minus square root 21 divided by 2 find the value of x + 1 over X and his X square + 1 over x square
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given,
x=5-√21/2
so,
x+1=5-√21/2+1
=(10-√21+2)/2
now,
x+1/x={(10-√21+2)/2}/(10-√21)/2
=10-√21+2/10-√21
=(10-√21+2)(10+√21)/10^2-√21^2
=99+2√21/79
x=5-√21/2
so,
x+1=5-√21/2+1
=(10-√21+2)/2
now,
x+1/x={(10-√21+2)/2}/(10-√21)/2
=10-√21+2/10-√21
=(10-√21+2)(10+√21)/10^2-√21^2
=99+2√21/79
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