Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °
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Sorry, that is the one I meant. The equation is right but the roots are obviously not. Like I said the ball can not possibly hit the ground in one second so you know something is wrong. The quadratic formula can be a little tricky.
Actually it is the last one:
as you said?
You know that neither of those answers make any sense. How could the ball hit the ground in 1 second? So either you picked the wrong equation or you did not solve it correctly.
Answers in math ought to make sense. Mine don't but that is only because I work on nonsense.
My class shows me how to do #15, this website shows the exact same thing: since I can't post links, search on Google: Using Quadratic Formula to Find the Zeros of a Polynomial and click the first link.
Alright, let me try that my self and please do tell any mistakes I make along the way. I will also try #15.
Your teacher is not correct but if he/she wants to say you are right then let's leave it alone for now.
The correct equation is,
Can't be one positive and one negative.
13) says integers...