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DragonLord

0
23
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Thank you DragonLord I honestly forgot about that formula

off-topic
Feb 4, 2020

#1
+177
+1

Its ok, there are many other ways to do that problem (eg. completing the square, factoring),  just remember the formula is $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}$$ :D

Feb 5, 2020