How To Solve A Quadratic Equation
|Education : Maths|
This may sound like a daunting step, but to solve a quadratic first you use steps you know: factorise it first.
Here's an example to work through:
Imagine you are asked to solve this equation:
x^2 - 4x - 12 = 0
First, we factorise the equation, using the technique we saw above, to get:
(x - 6) (x + 2) = 0
So, since when multiplied together the answer is 0, we know that:
either (x- 6) = 0 OR
(x + 2) = 0
So, either x = 6 OR x = -2
Questions about gcse maths:how to solve quadratic equations ...
- Mon, Jan 13th 2014