I am new to this. I am trying to teach myself algebra and physics. I am trying to understand the last part of this under relating the objects
. All circled variables are unknowns. More specifically part 3 and 4 especially 4, using a quadratic formula to figure out the unknown for t (time
1. Can you provide some clarity how the author found the unknowns when there are multiple unknowns in each equation? I have read there are ways to solve for two unknowns, but in this case it's a little foggy to me.
2. When do I know a situation calls for the use of the quadratic equation? I had no idea to use that here.
I would not have known what numbers and variables especially t^2
to insert into quadratic equation.