Maths equations

Some Important Maths Equations
1. a(b+c) = ab + ac
2. (a+b) 2 = a 2 + 2ab + b 2
3. (a-b) 2 = a 2 -2ab + b 2
4. (a+b) 2 = (a-b) 2 + 4ab
5. (a-b) 2 = (a+b) 2 - 4ab
6. (a-b) (a+b) = a 2 - b 2
7. (a+b) 3 = a 3 + 3ab(a+b) + b 3
8. (a-b) 3 = a 3 - 3ab(a-b) - b 3
9. a 3 + b 3 = (a+b) (a 2 - ab + b 2 )
10. a 3 - b 3 = (a-b) (a 2 + ab + b 2 )
11. (a 3 - b 3 ) / (a 2 + ab + b 2 ) = a-b
12. (a 3 + b 3 ) / (a 2 - ab + b 2 ) = a+b

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