Question

A = (m – 2n)(m + 2n) + 4n2

Answer 1

Recuerda:

$(x - y)(x + y) = {x}^{2} - {y}^{2}$

...

$A = (m - 2n)(m + 2n) + {4n}^{2} \\ A = {m}^{2} - {(2n)}^{2} + {4n}^{2} \\ A = {m}^{2} - {4n}^{2} + {4n}^{2} \\ A = {m}^{2}$

Answer 2

Respuesta:

A =m²

Explicación paso a paso:

A = (m – 2n)(m + 2n) + 4n²

A = m² + 2mn-2mn - 4n² + 4n²

A =m²

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