Observe e depois resolva as questoes se for um trimonio quadrado perfeito.
A) a² - 18 a + 81
B) x² + 16 x + 64
C) a² - 14 a + 49
D) y² - 50 y + 225
E) y² - 50 y + 225
F) x² + 100 x + 2500
G) y² + 60 y + 900
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