Exam 6: Rational Expressions and Equations

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Add. Simplify, if possible. - 2x−8+58−x\frac { 2 } { x - 8 } + \frac { 5 } { 8 - x }

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Add. Simplify, if possible. - 4y2−3y+2+5y2−1\frac { 4 } { y ^ { 2 } - 3 y + 2 } + \frac { 5 } { y ^ { 2 } - 1 }

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Find the LCM. - 10,12,3010,12,30

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Perform the indicated operation. Simplify, if possible. - 3(y−1)2y−7−y−37−2y−4y2y−7\frac { 3 ( y - 1 ) } { 2 y - 7 } - \frac { y - 3 } { 7 - 2 y } - \frac { 4 y } { 2 y - 7 }

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Subtract. Simplify, if possible. - 7xyx2−y2−x−yx+y\frac { 7 x y } { x ^ { 2 } - y ^ { 2 } } - \frac { x - y } { x + y }

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Simplify. - 1a+11a−1\frac { \frac { 1 } { a } + 1 } { \frac { 1 } { a } - 1 }

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Find the reciprocal. - 9y2+8y9 y ^ { 2 } + 8 y

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Perform the indicated operation. Simplify, if possible. - 8xx−5−4x−35−x−3xx−5\frac { 8 x } { x - 5 } - \frac { 4 x - 3 } { 5 - x } - \frac { 3 x } { x - 5 }

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Find the reciprocal. - t+11t−2\frac { t + 11 } { t - 2 }

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Divide and simplify. - 2x24÷x312\frac { 2 x ^ { 2 } } { 4 } \div \frac { x ^ { 3 } } { 12 }

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Subtract. Simplify, if possible. - −6y−8−48−y\frac { - 6 } { y - 8 } - \frac { 4 } { 8 - y }

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Multiply. Do not simplify. - 2a+19a−1⋅aa\frac { 2 a + 1 } { 9 a - 1 } \cdot \frac { a } { a }

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Subtract. Simplify, if possible. - 314x−910x2\frac { 3 } { 14 x } - \frac { 9 } { 10 x ^ { 2 } }

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Find all numbers for which the rational expression is not defined. - 2a−9\frac { 2 } { a - 9 }

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Perform the indicated operation. Simplify, if possible. - −25x3(5x+1)+13x(5x+1)−2x\frac { - 25 x } { 3 ( 5 x + 1 ) } + \frac { 1 } { 3 x ( 5 x + 1 ) } - \frac { 2 } { x }

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Subtract. Simplify, if possible. - 5x−15x2−9−5x−159−x2\frac { 5 x - 15 } { x ^ { 2 } - 9 } - \frac { 5 x - 15 } { 9 - x ^ { 2 } }

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Add, first finding the LCD. Simplify, if possible. - 45+49+14\frac { 4 } { 5 } + \frac { 4 } { 9 } + \frac { 1 } { 4 }

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Subtract. Simplify, if possible. - 4x−32x4−6x+56x\frac { 4 x - 3 } { 2 x ^ { 4 } } - \frac { 6 x + 5 } { 6 x }

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Divide and simplify. - z2+8z+15z2+12z+35÷z2+3zz2+3z−28\frac { z ^ { 2 } + 8 z + 15 } { z ^ { 2 } + 12 z + 35 } \div \frac { z ^ { 2 } + 3 z } { z ^ { 2 } + 3 z - 28 }

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Perform the indicated operation. Simplify, if possible. - bb2−25+5b+5−6b\frac { b } { b ^ { 2 } - 25 } + \frac { 5 } { b + 5 } - \frac { 6 } { b }

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