after doing some reading on intergrating factors, from



ive used the intergrating factor, whereby f(x) = -4x and a(x) = 4

so g(x)= exp^(intergral of 4 dx)

so

now using the formula y= 1/g(x).[intergral of f(x)g(x) dx]

so

is this correct and how would i carry on from this?