Exam 6: Rational Expressions and Equations

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Add or subtract. - x2+56x2+2x24+814x242xx2\frac { x ^ { 2 } + 56 } { x ^ { 2 } + 2 x - 24 } + \frac { 8 - 14 x } { 24 - 2 x - x ^ { 2 } }

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Multiply. - 6x9x29x2+24x+169x2+18x+89x24\frac { 6 x - 9 x ^ { 2 } } { 9 x ^ { 2 } + 24 x + 16 } \cdot \frac { 9 x ^ { 2 } + 18 x + 8 } { 9 x ^ { 2 } - 4 }

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Find the least common denominator. - 38a2b2110a3b\frac { 3 } { 8 a ^ { 2 } b ^ { 2 } } - \frac { 1 } { 10 a ^ { 3 } b }

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Divide. - (y10)28÷8y8064\frac { ( \mathrm { y } - 10 ) ^ { 2 } } { 8 } \div \frac { 8 \mathrm { y } - 80 } { 64 }

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Add or subtract. - 1(x3)(x+3)3(x+3)(x1)\frac { 1 } { ( x - 3 ) ( x + 3 ) } - \frac { 3 } { ( x + 3 ) ( x - 1 ) }

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Add or subtract. - 5y2+66y2+7y+152y6y2+7y+13y21y6y2+7y+1\frac { 5 y ^ { 2 } + 6 } { 6 y ^ { 2 } + 7 y + 1 } - \frac { 5 - 2 y } { 6 y ^ { 2 } + 7 y + 1 } - \frac { 3 y ^ { 2 } - 1 y } { 6 y ^ { 2 } + 7 y + 1 }

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Divide. - 7a2b3÷4a3b2\frac { 7 a ^ { 2 } } { b ^ { 3 } } \div \frac { 4 a } { 3 b ^ { 2 } }

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Simplify the rational expression. - 2x+210x2+16x+6\frac { 2 x + 2 } { 10 x ^ { 2 } + 16 x + 6 }

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Determine the domain of the function. - f(x)=12xx320x2+96xf ( x ) = \frac { 1 - 2 x } { x ^ { 3 } - 20 x ^ { 2 } + 96 x }

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Simplify the rational expression. - 6k12147k\frac { 6 k - 12 } { 14 - 7 k }

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