# formulae useWe learn so many formulae in maths? But I don't find any use of them in our daily life. Can there be any uses. Like what can be the use of (a + b)^2.

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Actually, we do use formulas in our everyday life. For example, the formula for miles per gallon or miles per hour are part of your life every day. Also, anyone who has ever done any home improvement knows you need a lot of formulas, such as length x width =area for finding carpet!

As an example, do you remember having to use the distance formula? Typed out, it's ((x1 - x2)^2 + (y1 - y2)^2) ^ .5

I've had to use this a few times already to detect collisions in my games, one of the most basic and necessary components in any game.

Even if you're not going into programming, you'd be surprised where math pops up.

First, you may not realize it, but having a basic understanding of math comes in handy in day-to-day life. You don't realize how nice it is to have this information at hand (or in your head) until you see someone struggling to calculate 5 * 4 without a calculator.

Second, many careers require you to know some fairly advanced mathematics. I'm studying game programming and am amazed at how much algebra and calculus I have to use just in the first year. So far we've used trig, derivatives, basic algebra, physics equations, and others. You never know when a good understanding of math will come in handy.

Impedence that are used in circuits with coils and condensor uses the imaginary number to represent its value of difficulty it has in that circuit.

At least, I thought that 'i' is such an wasteful number, but it wasn't ;;