1first oneis simple...
dx-dy = [(dx+dy)\div (x+y)]
which is x-y=log(x+y) +c
Simple one a) (x+y)(dx-dy)=dx+dy
Simple one b) x\left({\frac{dy}{dx}}\right)^{2}+(y-x)\frac{dy}{dx}-y = 0
Copied Questions Series
but good ones for JEE :P :D
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2 Answers
1second one take dy/dx=p
then solve it by puting x in LHS and differtiate wid respect to y...put dy/dx=p...and solve the differential equation..the solution is the p eliminatnt of the gven equation n the equation solved