Maths formulas

MATHS IMPORTANT FORMULAS

(α+в+¢)²= α²+в²+¢²+2(αв+в¢+¢α)
ALGEBRA

• 1. (α+в)²= α²+2αв+в²
• 2. (α+в)²= (α-в)²+4αв b
• 3. (α-в)²= α²-2αв+в²
• 4. (α-в)²= f(α+в)²-4αв
• 5. α² + в²= (α+в)² - 2αв.
• 6. α² + в²= (α-в)² + 2αв. 
• 7. α²-в² =(α + в)(α - в)
• 8. 2(α² + в²) = (α+ в)² + (α - в)²
• 9. 4αв = (α + в)² -(α-в)²
• 10. αв ={(α+в)/2}²-{(α-в)/2}²
• 11.(α + в + ¢)²=α²+в² + ¢² +2(αв + в¢ + ¢α)
• 12. (α + в)³ = α³ + 3α²в + 3αв² + в³
• 13. (α + в)³ = α³ + в³ + 3αв(α + в)
• 14. (α-в)³=α³-3α²в+3αв²-в³
• 15. α³ + в³ = (α + в) (α² -αв + в²)
• 16. α³ + в³ = (α+ в)³ -3αв(α+ в)
• 17. α³ -в³ = (α -в) (α² + αв + в²)
• 18. α³ -в³ = (α-в)³ + 3αв(α-в)

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