Question

x^2+y^2 when x-y=9 and xy =13
please give a clear explanation

Answer 1

Answer:

(x - y) = 9

=> (x - y )² = 9²

=> x² + 2xy + y² = 81

=> x² + y² = 81 - 2*13 [as, xy = 13]

=> x² + y² = 55

Step-by-step explanation:

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