Simplify fully (k+23)(k−23)11\displaystyle \frac{(k + 2\sqrt{3})(k - 2\sqrt{3})}{\sqrt{11}}11(k+23)(k−23) in terms of kkk.
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217 exam-style questions on WJEC GCSE Maths Surds. Each one has a worked solution and a mark scheme showing where the marks go.