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The equation (a+b)² = a² + 2ab + b² is an example of the formula for squaring a binomial. When you expand (a+b)², it means you are multiplying (a+b) by itself. To expand (a+b)², you can use the [distributive property] of [multiplication] over addition. This means you multiply each term in the first [expression] by each term in the second expression and then add the results. So, when you expand (a+b)², you get: (a+b)² = (a+b)(a+b) = a(a+b) + b(a+b) = a² + ab + ab + b² = a² + 2ab + b²
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