+79 Number 54:
since the axis of symmetry is a x = -2, the equation is \(y = (x-2)^2 + b\)
to find the equation, plug in x = -2 and y = 6 to find b
+79 55: AED and ACB are similar
56:
since the triangles are similar, AB is equal to 15 becuase ED / CB = AD / AB
