"noindent">which simplifies to</p>
<div class="equation">\[ 
		x^2 	 		=	49.
	 \]
</div><p class="noindent">Now the expression looks simpler, yes?<span class="intersentencespace"></span> How did I know to perform this operation?<span class="intersentencespace"></span> I wanted to “undo” the effects of the operation <span class="inline_math">\( -4 \)</span>.<span class="intersentencespace"></span> We undo an operation by applying its <em>inverse</em>.<span class="intersentencespace"></span> In the case w