The line \(BD\) is a tangent to a circle and the secant \(AD\) intersects the circle at \(A\) and \(C\).
Given that \(AC = 18\) and \(CD = 6\), find the value of \(x\). (2 marks)
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The line \(BD\) is a tangent to a circle and the secant \(AD\) intersects the circle at \(A\) and \(C\).
Given that \(AC = 18\) and \(CD = 6\), find the value of \(x\). (2 marks)
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