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10 cards from this deck
x=โbยฑb2โ4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}x=2aโbยฑb2โ4acโโ
ax2+bx+c=0ax^2 + bx + c = 0ax2+bx+c=0 where aโ 0a \neq 0a๎ =0
x=โb2ax = -\frac{b}{2a}x=โ2abโ
ฮ=b2โ4ac\Delta = b^2 - 4acฮ=b2โ4ac
Two distinct real solutions
Exactly one solution (repeated root)
No real solutions
When doesn't factor nicely or need exact values
Completing the square
Average of the two solutions
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