(3) (b) Solve the equation 15x 199.75 = 0 x2 – – ………………………… (3) (Total 6 marks) 31. (a) Factorise 2x2 35x + 98 – ................................... (a) Solve the equation 2x2 35x + 98 = 0 – 32. is a tangent at to a circle, centre AT T O. cm, (x + 5) cm, (x + 8) cm. OT = x AT = OA = (a) Show that 6x 39 = 0 x2 – –
(3) (b) Solve the equation x2 – 15x – 199.75 = 0 ………………………… (3) (Total 6 marks) 31. (a) Factorise 2x2 – 35x + 98 ................................... (a) Solve the equation 2x2 – 35x + 98 = 0 32. AT is a tangent at T to a circle, centre O. OT = x cm, AT = (x + 5) cm, OA = (x + 8) cm. (a) Show that x2 – 6x – 39 = 0