2002
(a) Simplify: \((2a + b)^{2} - (b - 2a)^{2}\)(b) Given that \(S = K\sqrt{m^{2} + n^{2}}\); (i) make \(m\) the subject of the relation; (ii) if \(S = 12.2\), \(K = 0.02\) and \(n = 1.1\), find, correct to the nearest whol…
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