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t(t)=-0.3t^2+1.2t+98.6
We move all terms to the left:
t(t)-(-0.3t^2+1.2t+98.6)=0
We get rid of parentheses
0.3t^2-1.2t+tt-98.6=0
We move all terms containing t to the left, all other terms to the right
0.3t^2-1.2t+tt=98.6
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