Respuesta:
Explicación paso a paso:
A² - B² = (A+B)(A-B)
4-(a-1)2
2² - (a-1)²
[2+(a-1)][2-(a-1)]
(2+a-1)(2-a+1)
(1+a)(3-a)
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Respuesta:
Explicación paso a paso:
A² - B² = (A+B)(A-B)
4-(a-1)2
2² - (a-1)²
[2+(a-1)][2-(a-1)]
(2+a-1)(2-a+1)
(1+a)(3-a)