Question

( a + b ) ² = how much​

Answer 1

Step-by-step explanation:

$\bull \: (a + b) ^{2} = {a}^{2} + {b}^{2} + 2ab \\ \\ \bull (a - b) ^{2} = {a}^{2} + {b}^{2} - 2ab \\ \\ \bull \: {a}^{2} - {b}^{2} = (a + b)(a - b)$

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