if (x+y) = 9 and (x-y) = 5 then ( x² +y²/2xy)= ?
Answers
Answered by
1
Answer:
x+y=9----->1
x-y=5----->2
substract 2 from 1
:. 2y=4
y=2.....
:. x=7....
:.x²+y²=7²+2²=49+4=53....
2xy=2X7X2=28...
:.53/28
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Answered by
2
Answer:
x+y=9----->1
x-y=5----->2
substract 2 from 1
:. 2y=4
y=2.....
:. x=7....
:.x²+y²=7²+2²=49+4=53....
2xy=2X7X2=28...
:.53/28
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