Find the general solution of the following first order differential equation, expressing your answers in the explicit form y=f(x)

x(dy/dx)+3y+2x^2 = x^3 +4x

don't even know where to start

The point of intersection of the diagonals of a rectangle is 4 cm further away from the smaller side then from the larger side of the rectangle. the perimeter of the rectangle is equal to 56 cm. find the lengths of the sides of the rectangle. 16 points answer quick