Question

If x-y = 9 and xy= 16. Find the value of :
${x } ^{2} + {y}^{2} ]{?}$
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Answer 1

Answer:

$\huge{\underline{\mathtt{\red{❥A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}}$

We have, x+y=9 and xy=16

(x+y)²=x²+2xy+y²=81

x²+y²=81−2xy=81−2(16)=81−32=49

Answer 2

Answer:

see the attachment.

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