calculate the area enclosed by the curve y=12-4x+3x² & line y=5 and the coordinates x=-2 and x=3

steps on how to complete would be great, figure i have to make the line and curve equal to each other which is already done because they both equal y, then i got stuck finding the values for x for them both when you factor out the quadratic... most likely going in the wrong direction but made a start.

thanks