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Use the discriminant, b24ac to determine the number and type of solutions to the equation x2x+8=0. No points will be given if the discriminant is not used.


Since the discriminant is b24ac=(1)24(1)(8)=31 and is negative, the equation has two imaginary solutions.

Download LATEX

\begin{question}Use the discriminant, $b^2-4ac$ to determine the number and type of solutions to the equation $x^{2} - x + 8 = 0$.  No points will be given if the discriminant is not used.
    \soln{9cm}{Since the discriminant is $b^2-4ac=(-1)^2-4(1)(8)=-31$ and is negative, the equation has two imaginary solutions.}

\end{question}

Download Question and Solution EnvironmentLATEX
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\usepackage{tikz}
\usepackage{amsmath}
\usepackage[margin=2cm]{geometry}
\usepackage{tcolorbox}

\newcounter{ExamNumber}
\newcounter{questioncount}
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\newenvironment{question}{{\noindent\bfseries Question \arabic{questioncount}.}}{\stepcounter{questioncount}}
\renewcommand{\labelenumi}{{\bfseries (\alph{enumi})}}

\newif\ifShowSolution
\newcommand{\soln}[2]{%
\ifShowSolution%
\noindent\begin{tcolorbox}[colframe=blue,title=Solution]#2\end{tcolorbox}\else%
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\fi%
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\newcommand{\hideifShowSolution}[1]{%
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\everymath{\displaystyle}
\ShowSolutiontrue

\begin{document}\begin{question}(10pts) The question goes here!
    \soln{9cm}{The solution goes here.}

\end{question}\end{document}
HTML for Canvas
<p> <p>Use the discriminant,  <img class="equation_image" title=" \displaystyle b^2-4ac " src="/equation_images/%20%5Cdisplaystyle%20b%5E2-4ac%20" alt="LaTeX:  \displaystyle b^2-4ac " data-equation-content=" \displaystyle b^2-4ac " />  to determine the number and type of solutions to the equation  <img class="equation_image" title=" \displaystyle x^{2} - x + 8 = 0 " src="/equation_images/%20%5Cdisplaystyle%20x%5E%7B2%7D%20-%20x%20%2B%208%20%3D%200%20" alt="LaTeX:  \displaystyle x^{2} - x + 8 = 0 " data-equation-content=" \displaystyle x^{2} - x + 8 = 0 " /> .  No points will be given if the discriminant is not used.</p> </p>
HTML for Canvas
<p> <p>Since the discriminant is  <img class="equation_image" title=" \displaystyle b^2-4ac=(-1)^2-4(1)(8)=-31 " src="/equation_images/%20%5Cdisplaystyle%20b%5E2-4ac%3D%28-1%29%5E2-4%281%29%288%29%3D-31%20" alt="LaTeX:  \displaystyle b^2-4ac=(-1)^2-4(1)(8)=-31 " data-equation-content=" \displaystyle b^2-4ac=(-1)^2-4(1)(8)=-31 " />  and is negative, the equation has two imaginary solutions.</p> </p>