How To Understand Completing The Square
| Education : Maths It is not immediately obvious what this term means, or when to use it. The answer is: it is used in algebra to solve a quadratic equation. It is used when the equation will not factorise (be expressed as a pair of brackets). To do this, you simply express the expression as a square, plus another term. Here's an example: x^2 + 10x This becomes: (x + 5)^2 - 25 How to work it out? To find the number, follow this easy step: Divide the coefficient of x by 2 then square, and take this away outside the equation.
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