Question

simplify solution of (a+2b)²-(a-2b)²​

Answer 1

${(a + b)}^{2} - {(a - b)}^{2} \\ \\ = ( {a}^{2} + {b}^{2} + 2ab) - ( {a}^{2} + {b}^{2} - 2ab) \\ \\ = {a}^{2} + {b}^{2} + 2ab - {a}^{2} - {b}^{2} + 2ab) \\ \\ = 4ab$

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