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(4x + 5) / (2x² - x - 1)
= 7(x - 1) - 3x(2x + 1) / (2x + 1)(x - 1)
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(4x + 5)/(2x² - x - 1)
= (7x - 7 - 6x² - 6x)/(2x² -x - 1)
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(4x + 5) / (2x² - x - 1)
= -6x² + x - 7
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4x + 5