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For question 1.c Chapter 3 Projectiles : I did like they did to solve for t by using the Vfx formula last time (b). Unfortunately they used the quadratic formula this time... The opposite of what I did...I'm lost....🤦‍♂️ Here's my work below..
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Explanation from Alloprof
This Explanation was submitted by a member of the Alloprof team.
Hello PeacefulPumpkin8091,
Thank you very much for your question! Normally, no matter what formula you used to solve the problem, you are still supposed to arrive at the correct answer. Indeed, there may be more than one possible formula that allows you to have the right answer. So I will tell you that, when you correct yourself, look at the answer and not the approach. Indeed, if you still managed to get the correct answer, but you do not follow the same approach as the answer key, then you can conclude that you have succeeded in the exercise. Here is a sheet that might help you:
I hope I answered your question. Don’t hesitate to write to us again if any questions persist!