Home
Login
Questions: Algebra BusinessCalculus
Please login to create an exam or a quiz.
Use the discriminant,
Since the discriminant is
\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}
\documentclass{article} \usepackage{tikz} \usepackage{amsmath} \usepackage[margin=2cm]{geometry} \usepackage{tcolorbox} \newcounter{ExamNumber} \newcounter{questioncount} \stepcounter{questioncount} \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% \vspace{#1}% \fi% }% \newcommand{\hideifShowSolution}[1]{% \ifShowSolution% % \else% #1% \fi% }% \everymath{\displaystyle} \ShowSolutiontrue \begin{document}\begin{question}(10pts) The question goes here! \soln{9cm}{The solution goes here.} \end{question}\end{document}
<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>
<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>