(a) : Parabola : y2 = 4(x − 2)...(i) and line: y = 2x − 8 ... (ii) ⇒ 4(x − 4)2 = 4(x − 2) ⇒ x2 − 9x + 18 = 0 ⇒ x = 3, 6 From (ii), we get ⇒ y = −2, 4 Point of intersections of (i) and (ii)
are (3, −2) and (6, 4). ∴ Required area = ∫−24 [ (2y+8) − (4y2 + 2) ] dy = [ 4y2 − 12y3 + 2y ]−24 = 9 sq. units