Question

if x+y=9 and xy=16 find the value of (x2+y2)​

Answer 1

Answer:

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Step-by-step explanation:

(x + y)² = x² + 2xy + y²

9² = x² + 2xy + y²

81= x² + 2xy + y²

(x²+y²)+2xy=81

(x²+y²)=81-2xy

(x²+y²)=81-2(16)

(x²+y²)=81-32

(x²+y²)=49

Answer 2

Step-by-step explanation:

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