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Long story short, over 15 years since finishing high school I'm studying for a math exam. I forgot almost everything about algebra since then, so I'm having a bit of an issue solving quadratic equations. Sure, there's the formula in the pic, but there's a bunch of "simple" exercises that expect me to solve by factorizing. I understand the concept and I can usually bruteforce the solution, but I feel like there has to be an easier way. The books I use seemingly expect me to already know it.
