# Algebra Formula

**Tutor description**

1. (a + b) 2 = a 2 + 2ab + b 2 or, (a – b) 2 + 4ab 2. (a - b) 2 = a 2 - 2ab + b 2 or, (a + b) 2 - 4ab 3. a 2 + b 2 = (a + b) 2 - 2ab or, (a - b) 2 + 2ab 4. a 2 – b 2 = (a + b) (a - b)

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