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Give the set of real-valued roots of the equation 

\n

\\[ \\simplify[all,fractionnumbers]{{ea}x^2+{eb}x+{ec}}=0 \\]

\n

Enter your answer as a list of numbers separated by commas and enclosed by square brackets, e.g. [1,2].

\n

If the equation has no roots, enter []

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The student is asked to integrate a given function. The marking algorithm differentiates the student's answer, and checks that it is equivalent to the original function.

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This part is marked by calculating the derivative of your answer and comparing it to the original expression.

\n

$\\displaystyle{\\int \\var{expr} \\,\\mathrm{d}x = }$ [[0]]

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\\begin{align} a &= \\var{a}, \\\\ b &= \\var{b} \\end{align}

\n

$\\sqrt{a} =$ [[0]] (give your answer to two decimal places)

\n

$\\sqrt{b} =$ [[1]] (give your answer to two decimal places)

\n

Using the answers you gave above, calculate $\\sqrt{a} + \\sqrt{b} = $ [[2]] (give your answer to two decimal places)

\n

If you enter incorrect values for either of $\\sqrt{a}$ and $\\sqrt{b}$ but do the addition correctly, you will only lose mark(s) for the initial error.

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Write a $2 \\times 2$ matrix. The feedback will show the bottom-right value.

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