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FORMULA CHAPTER

Chapter 01 – Quadratic Equations with One Variable

WBBSEClass 10Mathematics8 formulas
Complete WBBSE Class 10 quadratic equation formula list for Madhyamik preparation, including roots, discriminant and Sridhar Acharya’s formula.
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1
\mathrm{a}\mathrm{x}^{2}+\mathrm{b}\mathrm{x}+\mathrm{c}=0,\;\mathrm{a}\ne0
2
\mathrm{x}=\frac{-\mathrm{b}\pm\sqrt{\mathrm{b}^{2}-4\mathrm{a}\mathrm{c}}}{2\mathrm{a}}
3
\mathrm{\alpha}+\mathrm{\beta}=-\frac{\mathrm{b}}{\mathrm{a}}
4
\mathrm{\alpha}\mathrm{\beta}=\frac{\mathrm{c}}{\mathrm{a}}
5
\mathrm{a}\mathrm{\alpha}^{2}+\mathrm{b}\mathrm{\alpha}+\mathrm{c}=0
6
Discriminant (D) = b² - 4ac
7
Discriminant (D) = b² - 4ac > 0; Two real and unequal rootsDiscriminant (D) = b² - 4ac = 0; Two real and equal rootsDiscriminant (D) = b² - 4ac < 0; Two unreal and unequal roots
8
\mathrm{x}^{2}-(\mathrm{\alpha}+\mathrm{\beta})\mathrm{x}+\mathrm{\alpha}\mathrm{\beta}=0