The sum of the squares of two positive integers is 90. The product of the two integers is 27. What is the sum of the two integers?
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a²+b²=90
ab=27
(a+b)²=a²+b²+2ab
=90+54
=144
=>(a+b)=12
ab=27
(a+b)²=a²+b²+2ab
=90+54
=144
=>(a+b)=12
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