Exam 6: Rational Expressions and Equations

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Simplify. - y2−3y−28y2−2y−35\frac { y ^ { 2 } - 3 y - 28 } { y ^ { 2 } - 2 y - 35 }

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Multiply and, if possible, simplify. - 7x25⋅40x3\frac { 7 x ^ { 2 } } { 5 } \cdot \frac { 40 } { x ^ { 3 } }

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Simplify. - 43x3−512x54x+53x3\frac { \frac { 4 } { 3 x ^ { 3 } } - \frac { 5 } { 12 x } } { \frac { 5 } { 4 x } + \frac { 5 } { 3 x ^ { 3 } } }

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Perform the indicated operation. Simplify, if possible. - 3x+10x+1+x+3x+3−7x+21(x+1)(x+3)\frac { 3 x + 10 } { x + 1 } + \frac { x + 3 } { x + 3 } - \frac { 7 x + 21 } { ( x + 1 ) ( x + 3 ) }

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Divide and simplify. - x2+9x+14x+7÷x2−47x−14\frac { x ^ { 2 } + 9 x + 14 } { x + 7 } \div \frac { x ^ { 2 } - 4 } { 7 x - 14 }

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Find all numbers for which the rational expression is not defined. - 8y−4y2−16\frac { 8 y - 4 } { y ^ { 2 } - 16 }

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Find the LCM. - x2+9x+20,x2+2x−8x ^ { 2 } + 9 x + 20 , x ^ { 2 } + 2 x - 8

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Subtract. Simplify, if possible. - 7xx2−1−11−x\frac { 7 x } { x ^ { 2 } - 1 } - \frac { 1 } { 1 - x }

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Find the reciprocal. - x2+123−x\frac { x ^ { 2 } + 12 } { 3 - x }

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Multiply and, if possible, simplify. - x4−1x4−81⋅x2+9x2+1\frac { x ^ { 4 } - 1 } { x ^ { 4 } - 81 } \cdot \frac { x ^ { 2 } + 9 } { x ^ { 2 } + 1 }

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Simplify. - x4y−28y328y3−x4y\frac { \frac { x } { 4 y } - \frac { 2 } { 8 y ^ { 3 } } } { \frac { 2 } { 8 y ^ { 3 } } - \frac { x } { 4 y } }

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Find all numbers for which the rational expression is not defined. - c−79\frac { c - 7 } { 9 }

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Find the reciprocal. - 11y\frac { 11 } { y }

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Subtract. Simplify, if possible. - 93x2−73x2\frac { 9 } { 3 x ^ { 2 } } - \frac { 7 } { 3 x ^ { 2 } }

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Simplify. - y2+5yy2+6y\frac { y ^ { 2 } + 5 y } { y ^ { 2 } + 6 y }

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Find all numbers for which the rational expression is not defined. - b−66b−24\frac { b - 6 } { 6 b - 24 }

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Add. Simplify, if possible. - 7x5y+4xy3\frac { 7 } { x ^ { 5 } y } + \frac { 4 } { x y ^ { 3 } }

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Subtract. Simplify, if possible. - 20q−4−10q−4\frac { 20 } { q - 4 } - \frac { 10 } { q - 4 }

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Add. Simplify, if possible. - 3x+32x−5+2−8x−5+2x\frac { 3 x + 3 } { 2 x - 5 } + \frac { 2 - 8 x } { - 5 + 2 x }

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Add, first finding the LCD. Simplify, if possible. - 1112+59\frac { 11 } { 12 } + \frac { 5 } { 9 }

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