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If x+y=18 and xy=72, what is the vlaue o...

If x+y=18 and xy=72, what is the vlaue of `x^(2)+y^(2)?`

A

y=0.91x+ 8.74

B

y=1.02x+ 8.74

C

y=1.02x-7.02

D

y=0.91x-7. 02

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The correct Answer is:
B
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