BBC4 年
Solving quadratics by factorising when a ≠ 1 - Higher
\(2x^2 – 7x – 4\) factorises as \((2x + 1)(x – 4)\). \((2x + 1)(x – 4) = 0\). \(2x + 1 = 0 \) means \(x = -\frac{1}{2}\). \(x – 4 = 0\) means \(x = 4 ...
BBC4 年
Solving by quadratic formula - Higher
Using the quadratic formula is another method of solving quadratic equations. You will need to learn this formula, as well as understand how to use it. Key fact The quadratic formula for a ...