Number 10
2 marks · EasySimplify the expression . Give your answer as a surd in its simplest form.
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5\sqrt{7}
Also accept: 5\sqrt{7}
Common mistakes: ;
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Marking points
M1 · 1 mark · Correctly identifies that terms are like surds and can be added.
A1 · 1 mark · Final answer given as , simplified.
Worked solution
Add the coefficients: , so .