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No longer accept answers with a negative denominator #43528

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merged 1 commit into from Mar 19, 2013
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No longer accept answers with a negative denominator #43528

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22 changes: 12 additions & 10 deletions exercises/simplifying_rational_expressions_2.html
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Expand Up @@ -98,10 +98,16 @@
<var id="DENOMINATORSOL">expr(["+", ["*", COEFFICIENT2, X], CONSTANT2])</var>
<var id="NEGNUMERATORSOL">expr(["+", ["*", -COEFFICIENT1, X], -CONSTANT1])</var>
<var id="NEGDENOMINATORSOL">expr(["+", ["*", -COEFFICIENT2, X], -CONSTANT2])</var>
<var id="POSITIVENUMERATOR">getExpressionRegex(COEFFICIENT1, X, CONSTANT1)</var>
<var id="POSITIVEDENOMINATOR">getExpressionRegex(COEFFICIENT2, X, CONSTANT2)</var>
<var id="NEGATIVENUMERATOR">getExpressionRegex(-COEFFICIENT1, X, -CONSTANT1)</var>
<var id="NEGATIVEDENOMINATOR">getExpressionRegex(-COEFFICIENT2, X, -CONSTANT2)</var>
<var id="REGEX">(function() {
if (COEFFICIENT2 < 0 || (COEFFICIENT2 === 0 && CONSTANT1 < 0)) {
return [getExpressionRegex(-COEFFICIENT1, X, -CONSTANT1),
getExpressionRegex(-COEFFICIENT2, X, -CONSTANT2)];
} else {
return [getExpressionRegex(COEFFICIENT1, X, CONSTANT1),
getExpressionRegex(COEFFICIENT2, X, CONSTANT2)];
}
})()
</var>
</div>

<p class="question">Simplify the following expression:</p>
Expand All @@ -110,12 +116,8 @@

<div class="solution" data-type="set">
<div class="set-sol" data-type="multiple">
<span class="sol" data-type="regex"><var>POSITIVENUMERATOR</var></span>
<span class="sol" data-type="regex"><var>POSITIVEDENOMINATOR</var></span>
</div>
<div class="set-sol" data-type="multiple">
<span class="sol" data-type="regex"><var>NEGATIVENUMERATOR</var></span>
<span class="sol" data-type="regex"><var>NEGATIVEDENOMINATOR</var></span>
<span class="sol" data-type="regex"><var>REGEX[0]</var></span>
<span class="sol" data-type="regex"><var>REGEX[1]</var></span>
</div>
<div class="input-format">
<div class="entry" data-type="multiple">
Expand Down