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Expanding expressions

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Multiplying brackets $ \big(x \pm a \big)\big(x \pm b \big)$

This section will look at some techniques for expanding and simplifying algebraic expressions. In the first instance, we will be looking at the **distributive law**, which is defined mathematically as:

$a.(b+c)=a.b+a.c$

We can simply demonstrate that this is true, though proving it is, like so much mathematics, beyond the scope of this section.

$2(5+7) = 2 \times 12= 24$

$2(5+7) = 2 \times 5 + 2 \times 7 = 24$

This will lead us into **factorising** which is the same process, but backwards. This is what we can an **inverse** operation.