Math Journal

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Science

 

Written by:

Willie B

 

Date added:

November 6, 2016

 

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2 / 346

 

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After that you??d have to exclude the values that would make the denominator equal to zero because if you didn??t then the expression wouldn??t be true. So if you wanted to determine the expression for the denominator of a rational expression based on the fact that the restrictions on the variable are x?U2, and -3, you would have to work backwards...
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The next thing you would do is expand the brackets using FOIL or any of the other various methods. When you expand the bracket you get: x2 + 3x ?C 2x ?C 6. Then when you simplify it you would get x2 + x ?C 6. So therefore, the expression is You can??t add a common factor because then the expression wouldn??t make any sense...
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