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Pretty good at math (lemmy.dbzer0.com)
submitted 11 months ago by to c/AntiMeme@sopuli.xyz
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[–] 17 points 11 months ago* (3 children)

Alright, education time needed!

I'm a fair few years out from my entry level uni maths module, so:

In between the second and third step of the solution, why is 1a / 2√a = 6

not evaluating as

a/√a = 12 ?

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  • [–] 46 points 11 months ago (1 child)

    It does, he just didn’t show that a/√a simplifies to √a. There are a couple ways to think about it, but the simplest is if you just wanna get rid of the square root in the denominator, you can multiply the entire left side by (√a/√a) which gives you a√a / √a√a. This then turns into a√a/a. From there you get to just √a

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