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Glossary
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<p>Some equations can be transformed or manipulated into a quadratic equation, which makes them easier to solve. Equations that can be reduced to quadratic form often involve variables raised to powers or contain multiple terms.</p>
<h2>Types of Equations</h2>
<p>Equations that are reducible to quadratic form include:</p>
<ul>
<li><strong>Equations involving radicals:</strong> Equations with square roots or other radicals can often be squared to eliminate the radical and form a quadratic equation.</li>
<li><strong>Equations with rational expressions:</strong> Equations containing rational expressions can sometimes be transformed into quadratic equations by clearing denominators.</li>
<li><strong>Equations with variable substitutions:</strong> Substituting a new variable can sometimes transform a given equation into a quadratic equation.</li>
<li><strong>Equations involving trigonometric functions:</strong> Trigonometric identities or trigonometric substitutions can sometimes reduce trigonometric equations to quadratic form.</li>
</ul>
<h2>Example</h2>
<p>Let's consider the equation <math>\frac{1}{x} - \frac{1}{y} = 3</math>. We can rewrite it as:</p>
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<math>\frac{1}{x} - \frac{1}{y} = 3 \Rightarrow \frac{y - x}{xy} = 3 \Rightarrow y - x = 3xy</math>.<br>
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<p>Now, let's make a substitution, <math>z = xy</math>. This transforms the equation into a quadratic equation:</p>
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<math>y - x = 3xy \Rightarrow y - x = 3z \Rightarrow 3z - y + x = 0</math>.<br>
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<p>This equation is now in quadratic form, and we can solve it using quadratic equation-solving techniques.</p>
<p>Understanding how to manipulate equations into quadratic form can simplify the solving process and make it more manageable.</p>
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