Exam 6: Rational Expressions and Equations

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

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D

Multiply. Do not simplify. - x48x11\frac { x - 4 } { 8 - x } \cdot \frac { - 1 } { - 1 }

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Add. Simplify, if possible. - 8(x+2)2+7x+2\frac { 8 } { ( x + 2 ) ^ { 2 } } + \frac { 7 } { x + 2 }

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Simplify. - 4+13429\frac { 4 + \frac { 1 } { 3 } } { 4 - \frac { 2 } { 9 } }

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Subtract. Simplify, if possible. - 5xx25x+620x26x+8\frac { 5 x } { x ^ { 2 } - 5 x + 6 } - \frac { 20 } { x ^ { 2 } - 6 x + 8 }

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Add. Simplify, if possible. - 13x8+383x\frac { 1 } { 3 x - 8 } + \frac { 3 } { 8 - 3 x }

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Find the LCM. - 30,18,1530,18,15

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Find the reciprocal. - 2x2+y2\frac { 2 } { x ^ { 2 } + y ^ { 2 } }

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Find the LCM. - r2+16r+64,r2+8rr ^ { 2 } + 16 r + 64 , r ^ { 2 } + 8 r

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Find the reciprocal. - y2+8y+9y2y+11\frac { y ^ { 2 } + 8 y + 9 } { y ^ { 2 } - y + 11 }

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Subtract. Simplify, if possible. - 3x+16x2+3x10x+6x2+3x10\frac { 3 x + 16 } { x ^ { 2 } + 3 x - 10 } - \frac { x + 6 } { x ^ { 2 } + 3 x - 10 }

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Add. Simplify, if possible. - x+5x8+x38x+9(x+1)x8\frac { x + 5 } { x - 8 } + \frac { x - 3 } { 8 - x } + \frac { 9 ( x + 1 ) } { x - 8 }

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Find all numbers for which the rational expression is not defined. - d52d\frac { d - 5 } { 2 - d }

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Simplify. - 12m3p26m8p\frac { 12 m ^ { 3 } p ^ { 2 } } { 6 m ^ { 8 } p }

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Add. Simplify, if possible. - 31m+1m1\frac { 3 } { 1 - m } + \frac { 1 } { m - 1 }

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Subtract. Simplify, if possible. - 1313x813x\frac { 13 } { 13 x } - \frac { 8 } { 13 x }

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Find the LCM. - 72x,9x2,8x372 x , 9 x ^ { 2 } , 8 x ^ { 3 }

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Simplify. - 1010x5x5\frac { 10 - 10 x } { 5 x - 5 }

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Simplify. - 9x245x15x275x\frac { 9 x ^ { 2 } - 45 x } { 15 x ^ { 2 } - 75 x }

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Find the reciprocal. - x2+8xyy2x27xy+y2\frac { x ^ { 2 } + 8 x y - y ^ { 2 } } { x ^ { 2 } - 7 x y + y ^ { 2 } }

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