Solution 18.9b
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(New page: <math>\begin{align} & 3{{t}^{2}}-24t+45=0 \\ & {{t}^{2}}-8t+15=0 \\ & (t-3)(t-5)=0 \\ & t=3\ \text{s or }t=5\ \text{s} \\ \end{align}</math>)
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\displaystyle \begin{align} & 3{{t}^{2}}-24t+45=0 \\ & {{t}^{2}}-8t+15=0 \\ & (t-3)(t-5)=0 \\ & t=3\ \text{s or }t=5\ \text{s} \\ \end{align}
