This week, I learnt a useful trick I could apply anywhere, from this question. Factoring the formula helped put it in a simpler form I could better understand, and organized it into compact parts. This will save time when punching in numbers on a calculator. It will also make sure I don’t mess up a step, since with the old formula, I simply calculated everything in a messy way:

I would normally multiply or take care of exponents, and save the answers in my calculator. Then I would add the two saved numbers together for an accurate answer. However, it can get confusing and I sometimes lose track of what I had already multiplied together. This formula looks much nicer:

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