All the answers in math class b of grade one.

1. multiplication and factorization a2-B2 = (a+b) (a-b) a3+B3 = (a+b) (a2-ab+B2) a3-B3 = (a-b (a2+ab+B2) 2. Trigonometric inequality | a+b | ≤|+ The relationship between the root and the coefficient of the solution of a quadratic equation-b+√ (B2-4ac)/2a-b-√ (B2-4ac)/2ax1+x2 =-.

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