Express the area of a square whose side is represented by 3x-7 as a trinomial

Area of a square = s^2 = (3x - 7)^2 = (3x - 7)(3x - 7) = 9x^2 - 42x + 49

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .