Question

if x + y = 9 and x - y = 5 then x² + y²/ 2xy = ?

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Answer 1

Answer:

$\huge\mathfrak\orange{Hii}$

Find an answer to your question Let's find x²+y²/2xywhen (x + y) = 9 and (x - y) = 5 ... xy=14. (x^2+y^2)=(x+y)^2-2xy=81-28. =53. (x^2+y^2)/ 2xy=53/28. 0.0 ... Sec a + tan a=3 then 4xy=(x+y)^2-(x-y)^2=81-25=56xy=14(x^2+y^2)=(x+y)^2-2xy=81-28=53(x^2+y^2)/2xy=53/28

$\huge\mathfrak\orange{Please\;follow\;me}$

Answer 2

Answer:

x+y=9......1

x-y=5......2

from 1and2

=2x=14

x=7

putting the value of x in eq. 1

y=2

A.T.Q.

X2+y2/2xy49+4/2*2*7

=49+4/2*2*7

53/28=1.8