Respuesta:
[tex](a - b)(a + b) = {a}^{2} - {b}^{2} [/tex]
entonces
[tex] {(2a)}^{2} - {1}^{2} = 4 {a}^{2} - 1[/tex]
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Verified answer
Respuesta:
[tex](a - b)(a + b) = {a}^{2} - {b}^{2} [/tex]
entonces
[tex] {(2a)}^{2} - {1}^{2} = 4 {a}^{2} - 1[/tex]