Quadratics (Edexcel -2011) Archives — O/A Level Solutions

Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2011 | June | Q#7

Hits: 36 Question where k is a real constant. a. Find the discriminant of f(x) in terms of k. b. Show that the discriminant of f (x) can be expressed in the form (k + a)2 + b, where a and b are integers to be found. c. Show that, for all values of k, […]

Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2011 | January | Q#8

Hits: 28 Question The equation x2 + (k − 3)x + (3− 2k) = 0, where k is a constant, has two distinct real roots. a. Show that k satisfies k2 + 2k – 3>0 b. Find the set of possible values of k. Solution a. We are given that; We are given that given equation has […]