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8 June, 23:55

Jeremy subtracted the following rational expressions. His teacher told him that his answer was incorrect. Explain Jeremy's error in the simplification process and provide the correct result.

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  1. 9 June, 00:26
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    Since this is a subtraction problem, Jeremy needed to distribute the negative to the terms in the numerator. Jeremy only distributed it to the x 2 - term, and not to 15. Instead, he kept the 15 positive. When he combined like terms, he got a result of 5 for the constants. The correct result is x + 5.
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