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Given that x^2-3x+1=0, then the value of...

Given that `x^2-3x+1=0,` then the value of the expression `y=x^9+x^7+x^(-9)+x^(-7)` is divisible by prime number?

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CENGAGE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  12. If x+y+z=12 andx^2+y^2+z^2=96 and 1/x+1/y+1/z=36 , then the value x^3+...

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  18. If x^3+3x^2-9x+c is of the form (x-alpha)^2(x-beta) , then c is equ...

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  19. If x=a+b,y=a alpha+b beta and z=abeta+ b alpha , where alpha and beta...

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  20. If z=(a+ib)^5+(b+ia)^5 then prove that Re(z)=Im(z), where a,b in R.

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