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= 8a
= 8a
= 8a
= 8a
a² + 8 = 8a
a² - 8a = - 8
a² - 8a + 16 = 16 - 8
(a - 4)² = 8
a - 4 = √8
a = 4 + √8 atau a = 4 - √8
a = 4 + 2√2 atau a = 4 - 2√2