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18 cards from this deck
Complex roots
Quadratic formula
az2+bz+c=0az^2+bz+c=0az2+bz+c=0
z=−b±b2−4ac2az=\frac{-b\pm\sqrt{b^2-4ac}}{2a}z=2a−b±b2−4ac
Negative number under square root causes error
Negative discriminant (b2−4ac<0b^2-4ac<0b2−4ac<0)
Coefficients
2i2i2i
Roots involving iii when discriminant is negative
x=−b±b2−4ac2ax=\frac{-b\pm\sqrt{b^2-4ac}}{2a}x=2a−b±b2−4ac
ax2+bx+c=0ax^2+bx+c=0ax2+bx+c=0
b2−4acb^2-4acb2−4ac
Discriminant is negative: b2−4ac<0b^2-4ac<0b2−4ac<0
−1-1−1
Imaginary unit where i2=−1i^2=-1i2=−1
aaa, bbb, ccc
Show full working using quadratic formula
Real part ±\pm± imaginary part iii
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