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<!DOCTYPE html>
<html data-require="math math-format">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Factoring polynomials 1</title>
<script src="../khan-exercise.js"></script>
<div class="exercise">
<div class="problems">
<div class="vars">
<div data-ensure="abs(A) !== abs(B)">
<var id="A">randRangeNonZero( -10, 10 )</var>
<var id="B">randRangeNonZero( -10, 10 )</var>
<var id="SQUARE">1</var>
<var id="CONSTANT">SQUARE*A*B</var>
<var id="SIMPLECONSTANT">A*B</var>
<var id="LINEAR">SQUARE*(-A-B)</var>
<var id="SIMPLELINEAR">-A-B</var>
<p class="problem">Factor the following expression:</p>
<p class="question"><code><var>plus(SQUARE + "x^2")</var> + <var>plus( LINEAR + "x" )</var> + <var>CONSTANT</var></code></p>
<div class="solution" data-type="set">
<div class="set-sol" data-type="regex">^\s*\(\s*[xX]\s*<var>A &lt; 0 ? "\\+" : "[-\u2212]"</var>\s*<var>abs( A )</var>\s*\)\s*\(\s*[xX]\s*<var>B &lt; 0 ? "\\+" : "[-\u2212]"</var>\s*<var>abs( B )</var>\s*\)\s*$</div>
<div class="set-sol" data-type="regex">^\s*\(\s*[xX]\s*<var>B &lt; 0 ? "\\+" : "[-\u2212]"</var>\s*<var>abs( B )</var>\s*\)\s*\(\s*[xX]\s*<var>A &lt; 0 ? "\\+" : "[-\u2212]"</var>\s*<var>abs( A )</var>\s*\)\s*$</div>
<div class="input-format"><span class="entry"></span></div>
<div class="example">a factored expression, like <b>(x+1)(x+2)</b></div>
<div class="hints">
<code>(x <var>A &lt; 0 ? "+" : ""</var> <var>-A</var>)
(x <var>B &lt; 0 ? "+" : ""</var> <var>-B</var>)</code>
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