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0=-16^2+104t+56
We move all terms to the left:
0-(-16^2+104t+56)=0
We add all the numbers together, and all the variables
-(-16^2+104t+56)=0
We get rid of parentheses
-104t-56+16^2=0
We add all the numbers together, and all the variables
-104t+200=0
We move all terms containing t to the left, all other terms to the right
-104t=-200
t=-200/-104
t=1+12/13
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