Respuesta:
5a² - 34
Explicación paso a paso:
= (a + 3)(a - 3) + (2a + 5)(2a - 5)
= a² - 9 + 4a² - 25
= 5a² - 34
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Respuesta:
5a² - 34
Explicación paso a paso:
= (a + 3)(a - 3) + (2a + 5)(2a - 5)
= a² - 9 + 4a² - 25
= 5a² - 34