lass="intersentencespace"></span> Seven squared is 49, <span class="inline_math">\( 7^2=49 \)</span>, and negative seven squared is also 49, <span class="inline_math">\( (-7)^2 = 49 \)</span>,
because the two negative signs cancel each other out.</p>
<p>The final solutions to the equation <span class="inline_math">\( x^2-4=45 \)</span> are</p>
<div class="equation">\[ 
	 x  = 7 \qquad \textrm{and} \qquad   x=  - 7.
	 \]
</div><p class="noindent">Yes, there are <em>two</em> possible answers.<span class="inte