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10 cards from this deck
x=−b±b2−4ac2ax=\frac{-b \pm \sqrt{b^2-4ac}}{2a}x=2a−b±b2−4ac
Coefficient of x2x^2x2 term
Coefficient of xxx term
Constant term
b2−4acb^2-4acb2−4ac
Identify coefficients aaa, bbb, ccc
Two solutions: one with +++, one with −-−
a=2a=2a=2
b=−7b=-7b=−7
x=3x=3x=3 and x=12x=\frac{1}{2}x=21
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