Let, Shefali's marks in Mathematics = x Therefore, Shefali's marks in English = 30 – x If she got 2 marks more in Mathematics and 3 marks less in English, Marks in Mathematics = x + 2 Marks in English = 30 – x – 3 According to questions, Product = (x + 2)(27 – x) = 210 ⇒ 27x – x^2 + 54 – 2x = 210 ⇒〖-x〗^2 + 25x – 156 = 0 ⇒ x^2 – 25x + 156 = 0 ⇒ x^2 – 12x – 13x + 156 = 0 ⇒ x(x – 12) – 13(x – 12) = 0 ⇒ (x – 12)(x – 13) = 0 ⇒ (x – 12) = 0 or (x – 13) = 0 Either x = 12 or x = 13 If x = 12 then, marks in Maths = 12 and marks in English = 30 – 12 = 18 If x=13 then, marks in Maths = 13 and marks in English = 30 – 13 = 17