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<!DOCTYPE html>
<html data-require="math expressions">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Exponent rules</title>
    <script src="../khan-exercise.js"></script>

    <style>
        .sol input {
            width: 25px !important;
        }
    </style>
</head>
<body>
    <div class="exercise">
        <div class="problems">
            <div id="adding">
                <div class="vars" data-ensure="EXP1 !== EXP2">
                    <var id="BASE">randRange(3, 9)</var>

                    <var id="EXP1">randRange(3, 12) * (rand(2) ? 1 : -1)</var>
                    <var id="EXP2">randRange(3, 12) * (rand(2) ? 1 : -1)</var>
                </div>

                <p class="question">What is <code><var>expr(["*", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var></code>?</p>
                <p class="solution" data-type="multiple">
                    <code><var>BASE</var></code> <span class="sol exp"><var>EXP1 + EXP2</var></span>
                </p>

                <div class="hints">
                    <p><code>
                        <var>expr(["*", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var> = <var>expr(["^", BASE, ["+", EXP1, EXP2]])</var>
                    </code></p>
                    <p><code>
                        \hphantom{<var>expr(["*", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var>} = <var>expr(["^", BASE, EXP1 + EXP2])</var>
                    </code></p>
                </div>
            </div>

            <div id="subtracting" data-type="adding">
                <p class="question">What is <code>\displaystyle <var>expr(["frac", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var></code>?</p>
                <p class="solution" data-type="multiple">
                    <code><var>BASE</var></code> <span class="sol exp"><var>EXP1 - EXP2</var></span>
                </p>

                <div class="hints">
                    <p><code>\displaystyle
                        <var>expr(["frac", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var> = <var>expr(["^", BASE, ["-", EXP1, EXP2]])</var>
                    </code></p>
                    <p><code>\displaystyle
                        \hphantom{<var>expr(["frac", ["^", BASE, EXP1], ["^", BASE, EXP2]])</var>} = <var>expr(["^", BASE, EXP1 - EXP2])</var>
                    </code></p>
                </div>
            </div>

            <div id="multiplying" data-type="adding">
                <p class="question">What is <code><var>expr(["^", ["^", BASE, EXP1], EXP2])</var></code>?</p>
                <p class="solution" data-type="multiple">
                    <code><var>BASE</var></code> <span class="sol exp"><var>EXP1 * EXP2</var></span>
                </p>

                <div class="hints">
                    <p><code>
                        <var>expr(["^", ["^", BASE, EXP1], EXP2])</var> = <var>expr(["^", BASE, ["*", EXP1, EXP2]])</var>
                    </code></p>
                    <p><code>
                        \hphantom{<var>expr(["^", ["^", BASE, EXP1], EXP2])</var>} = <var>expr(["^", BASE, EXP1 * EXP2])</var>
                    </code></p>
                </div>
            </div>

            <div id="combined">
                <div class="vars" data-ensure="getGCD(BASE1, BASE2) === 1">
                    <var id="BASE1">randRange(3, 9)</var>
                    <var id="BASE2">randRange(3, 9)</var>

                    <var id="EXP1">randRange(3, 12) * (rand(2) ? 1 : -1)</var>
                    <var id="EXP2">randRange(3, 12) * (rand(2) ? 1 : -1)</var>
                    <var id="EXP3">randRange(3, 12) * (rand(2) ? 1 : -1)</var>
                </div>

                <p class="question">What is <code><var>expr(["^", ["*", ["^", BASE1, EXP1], ["^", BASE2, EXP2]], EXP3])</var></code>?</p>
                <p class="solution" data-type="multiple">
                    <code><var>BASE1</var></code> <span class="sol exp"><var>EXP1 * EXP3</var></span> &middot; <code><var>BASE2</var></code> <span class="sol exp"><var>EXP2 * EXP3</var></span>
                </p>

                <div class="hints">
                    <p><code>
                        <var>expr(["^", ["*", ["^", BASE1, EXP1], ["^", BASE2, EXP2]], EXP3])</var> = <var>expr(["*", ["^", BASE1, ["*", EXP1, EXP3]], ["^", BASE2, ["*", EXP2, EXP3]]])</var>
                    </code></p>
                    <p><code>
                        \hphantom{<var>expr(["^", ["*", ["^", BASE1, EXP1], ["^", BASE2, EXP2]], EXP3])</var>} = <var>expr(["^", BASE1, EXP1*EXP3])</var> \cdot <var>expr(["^", BASE2, EXP2*EXP3])</var>
                    </code></p>
                </div>
            </div>
        </div>
    </div>
</body>
</html>
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