We found our midterm questions.Please help me to solve them.Thank you so much:

1)y.y'' + 3(y')^2=0 this is differential equation.find the solution.???

2)x'=q - 12 + 3x - x^3 q is a bifurcation point.Draw the bifurcation diagram

3)a)show that any linear 1st order dif. eq. can be writen as a total differential?

b)obtain 'that' total dif ?

thank you so much.....again