if x=7+3√5/7-3√5 and y=√5+√2/√5-√2 find the value of x^2+1/x^
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x²+xy+y²={(√5-√2÷√5+√2)+(√5+√2÷√5-√2)}²
x²+xy+y²={(√5-√2)(√5-√2)+(√5+√2)(√5+√2)÷(√5+√2)(√5-√2)}²
x²+xy+y²={(√5-√2)²+(√5+√2)²÷(√5)²-(√2)²}²
x²+xy+y²=[{(√5)²-(√2)²}²÷5-3]²
x²+xy+y²={(5-2)²÷3}²
x²+xy+y²={(3)²÷3}²
x²+xy+y²={9÷3}²
x²+xy+y²=(3)²
x²+xy+y²=9
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