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If x y=4,p rov et h a tx((dy)/(dx)+y^2)=...

If `x y=4,p rov et h a tx((dy)/(dx)+y^2)=3y`

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Given `xy=4`
=`x(dy/dx)+y=0`
=`(dy/dx=-y/x`
L.H.S`x((dy)/(dx)+y^2)`
=`x(-y/x+y^2)`
=`-y+xy^2`
=`-y+xy.y`
=`3y`=R.H.S
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