1MA0 Higher November 2015 Paper 2 Q22

EdexcelHigherOld spec3 marksSolving Quadratics

22 Alison is using the quadratic formula to solve a quadratic equation.
She substitutes values into the formula and correctly gets

\[x = \frac{-7 \pm \sqrt{49 - 32}}{4}\]

Work out the quadratic equation that Alison is solving.
Give your answer in the form \(ax^2 + bx + c = 0\), where \(a\), \(b\) and \(c\) are integers. (3)

Mark scheme

Answer	Mark	Notes
\(2x^2 + 7x + 4\) \(= 0\)	3	M1 for finding a correct coefficient M1 for a method to find \(a\) and \(c\) or \(b\) and \(c\) A1 \(2x^2 + 7x + 4 = 0\) or \(a = 2\), \(b = 7\), \(c = 4\)