Which of the following is a quadratic binomial ? (i) (x + 2)(x -1)
(ii) (x + 1)(x - 1)
(iii) (x + 1) (x -2)
(iv) (x + 2)(x + 1)​

“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 .