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# What is the use of algebra? Give examples.

**Algebra helps you think logically:**

Studying algebra helps your mind to think logically and break down and solve problems. One day you might reach a point where you don’t use algebra on a daily basis. However your brain will have been trained to think in a logical way, which will not only help you in the workplace, but also in daily life, when choosing which mobile phone contract to select, or trying to work out if you have paid the right amount of tax.

**Algebra helps us understand numbers better:**

You might not realise it, but studying algebra helps you get better at solving problems which involve only numbers. If a pupil did not study any algebra, then it is likely that they would be worse at solving numerical problems, as their grasp of how numbers work would not be as good.

**Algebra is a powerful tool:**

One of the main reasons for algebra is that it allows you to take a situation and make it more general. For example take the humble triangle – because of algebra we have a formula which tells us the area of every triangle in the world.

A=$\frac{1}{2}\times b \times h$

Formulae are powerful as they tell us rules which work in every single situation. Formulae have been discovered ranging from simple things like the area of a circle to Einstein’s famous formula for energy: E=$mc^2$ .

Formulae impact us in every area of our lives, from the price of our energy bills to how much getting a mortgage will cost.

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