How can we help?
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yan commented,
there's a rule you have to learn : ax2 + bx + c = 0 1st : calculate a strange quantity : b2 - 4ac 2nd : if This quantity is positive then x = (-b + sqrt(quantity)) / 2a or x = (-b - sqrt(quantity)...
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yan commented,
Exactly. I'm mixing the 2 because input is very easy on the app, but no challenge mode : too bad !
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