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Class 11 · Mathematics (041) · Unit 4: Complex Numbers and Quadratic Equations

Quadratic Equations with Complex Roots

Lesson 4 of 4
ax2+bx+c=0ax^2 + bx + c = 0 has roots x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}. When discriminant <0< 0, roots are complex conjugates.
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v1.1 · Sept 2026