Question

if x+y=9 and xy=20, value of x^2 + y^2 is ?

Answer 1

Step-by-step explanation:

(x+y) ² = x² + y² +2xy

= 9² = x² +y² +2×20

= 81-40 = x² + y² = 41

Answer 2

Answer:

41

Step-by-step explanation:

xy is 20

so we can take x as 4 and y as 5

therefore 4 plus 5 is 9

therefore 4^2 is 16

= 5^2 is 25

= 16 +25

= 41

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