rsentencespace"></span> You can check that both of the above values of <span class="inline_math">\( x \)</span> satisfy the initial equation <span class="inline_math">\( x^2-4=45 \)</span>.</p>
<p style="margin-top: 12.0pt">If you are comfortable with all the notions of high school math
and you feel you could have solved the equation <span class="inline_math">\( x^2-4=45 \)</span> on your own, then you can skim through this chapter quickly.<span class="intersentencespace"></span> If on the other hand you ar