Respuesta:
1- (x + 6) ² - (x + 3) ² = 6x + 27
2- (x + 7) ² - (x + 3) . (x - 4) = 15x + 61
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Respuesta:
1- (x + 6) ² - (x + 3) ² = 6x + 27
2- (x + 7) ² - (x + 3) . (x - 4) = 15x + 61