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RESOLVEMOS LA INECUACIÓN:
9x² - 1 - [4x² - 1] ≤ 5(x² - 4x + 4)
9x² - 1 - 4x² + 1 ≤ 5x² - 20x + 20
20x ≤ 20
x ≤ 1
ESO ES TODO, SALUDOS..........................