evaluate x³+1÷x² when x= 3+√8
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x^3+1 / x^2
={(3+√8)^3 +1 }/(3+√8)^2
=(27+8√8+27√8+72 +1) /(3+√8)^2
=100+35√8 / 9+8+6√8
=100+35√8 / 17+6√8
={(3+√8)^3 +1 }/(3+√8)^2
=(27+8√8+27√8+72 +1) /(3+√8)^2
=100+35√8 / 9+8+6√8
=100+35√8 / 17+6√8
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