Respuesta:
[tex]81 {x}^{2} - 36[/tex]
Explicación paso a paso:
[tex](9x + 6)(9x - 6) \\c = 81 {x}^{2} - 54x + 54x - 36 \\c = 81 {x}^{2} - 36[/tex]
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Respuesta:
[tex]81 {x}^{2} - 36[/tex]
Explicación paso a paso:
[tex](9x + 6)(9x - 6) \\c = 81 {x}^{2} - 54x + 54x - 36 \\c = 81 {x}^{2} - 36[/tex]