I will suppose you want to find the point(s) of intersection of the two functions listed
equate them and solve for 'x'
-3x^2 - 30x - 76 = 2x^2+20x+44 simplify
5x^2 +50x +120 = 0 divide through by 5 (you could just use Quadratic formula here)
x^2 +10x+ 24 = 0 Now use quadratic formula to find x = -4 and -6
these are the x coordinates of the points of intersection....
now substitute these values of x into either of the equations to find the corresponding y coordinates ...done !