Question

If x-y =7 and xy = 9 find the value of x^2+y^2

Answer 1

Answer:

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Step-by-step explanation:

$\huge{ \green{ \boxed{answer..}}}$

$\red{x - y = 7 }\\ = >\bold{(x - y) {}^{2} = 49} \\ = > \bold{ {x}^{2} - 2xy + {y}^{2} = 49} \\ = > \bold{ {x}^{2} - 2(9) + {y}^{2} = 49} \\ = > \bold{ {x}^{2} + {y}^{2} = 67} (\blue{answer})$

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