[4] (iii) Calculate the area of the triangle. [2] 5. NOT TO SCALE In triangle the line is perpendicular to ABC, BD AC. = (x + 6) cm, = (x + 2) cm and the height = (x + 1) cm. AD DC BD The area of triangle is 40 cm2. ABC (i) Show that + 5x 36 = 0. x2 – (i) Answer ……..……….……… [3] (ii) Solve the equation + 5x 36 = 0. x2 – (ii) = or = Answer x x ….… …… [2] (iii) Calculate the length of BC.
[4] (iii) Calculate the area of the triangle. [2] 5. NOT TO SCALE In triangle ABC, the line BD is perpendicular to AC. AD = (x + 6) cm, DC = (x + 2) cm and the height BD = (x + 1) cm. The area of triangle ABC is 40 cm2. (i) Show that x2 + 5x – 36 = 0. Answer (i) ……..……….……… [3] (ii) Solve the equation x2 + 5x – 36 = 0. Answer (ii) x = ….… or x = …… [2] (iii) Calculate the length of BC.
quadratic-equations.docx