Please answer question 9.
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If x^2 - 5x - 1 = 0 . Find the value of x^2 + 1/x^2
d= b^2- 4ac b=-5
c=-1
a=1
25-(-4)
=29
x = -b -+ under root b^2-4ac/2a
x = 5 + under root 29/2 or x=5- under root 29/2
put the value of x now
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If x^2 - 5x - 1 = 0 . Find the value of x^2 + 1/x^2
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