If a-1/a=4 then find a^2-1/a^2
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<h2>Maneuvering an equals sign</h2><h3>Concept</h3>
Learn the rules and implications of moving numbers across an equals sign to combine like terms.
<h3>Utilization</h3>When you move a negative number across an equals sign (in incredibly linear equations), you should always add it, the inverse (subtract) goes for positive numbers.
x = -11