BASIC MATHS FORMULA..

                                                              ALGEBRA FORMULA

1. (a + b)2 = a2 + 2ab + b2; a2 + b2 = (a+b)2 −2ab
2. (a − b)2 = a2 − 2ab + b2; a2 + b2 = (a−b)2 + 2ab
3. (a + b + c)2 = a2 + b2 + c2 + 2(ab + bc + ca)
4. (a + b)3 = a3 + b3 + 3ab(a + b); a3 + b3 = (a+b)3 −3ab(a + b)
5. (a − b)3 = a3 − b3 − 3ab(a − b); a3 − b3 = (a−b)3 + 3ab(a − b)
6. a2 − b2 = (a+b)(a − b)
7. a3 − b3 = (a−b)(a2 + ab + b2)
8. a3 + b3 = (a+b)(a2 − ab + b2)
9. an − bn = (a−b)(an−1 + an−2b + an−3b2 + +bn−1)
10. an = a:a:a : : : n times

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