Solve the quadratic by factorising and choose the correct solution.
\( \text{Solve the quadratic equation: } x^2 - 3x - 18 = 0 \)
Choose one option:
Multiply to the constant term, sum to middle coefficient.
Factor: \((x - 6)(x + 3) = 0\) gives roots \(x = 6\) and \(x = -3\).
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