If x+y=9 and xy=20 then find x^2+y^2
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Answered by
1
Answer: 41
Step-by-step explanation:
Given,
x+y=9 , xy=20
We know that ,
(x+y)² = x² + y² + 2xy
(9)² = x² + y² + 2 x 20
81 = x² + y² + 40
81 - 40 = x² + y²
41 = x² + y²
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