Respuesta:
Recordar:
(a-b) ² = a² + b² - 2ab
Ahora:
a = 4/5j
b = 7/8a
Entonces
(4/5j - 7/8a)² = 16/25j² + 49/64a² - 2(4/5j)(7/8a)
(4/5j - 7/8a)² = 16/25j² + 49/64a² - 7/5ja
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Respuesta:
Recordar:
(a-b) ² = a² + b² - 2ab
Ahora:
a = 4/5j
b = 7/8a
Entonces
(4/5j - 7/8a)² = 16/25j² + 49/64a² - 2(4/5j)(7/8a)
(4/5j - 7/8a)² = 16/25j² + 49/64a² - 7/5ja