13. If x+y=6 and xy=13, find x^2 + y^2. – InterviewSolution

1.	13. If x+y=6 and xy=13, find x^2 + y^2.
Answer» 10Step-by-step explanation:x+y=6 (given)squaring on both SIDE(x+y)^2=(6)^2x^2+2xy+y^2=36x^2+2(13)+y^2=36x^2+26+y^2=36x^2+y^2=36-26x^2+y^2=10

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