Question

how do I find the points that most closely represents the negative squareroot of 77?

Answer 1

First, we see that

$\begin{gathered} (-8.8)^2=77.44 \\ (-8.7)^2=75.69 \end{gathered}$

Then the number o is clearly the farest number. Since m is closer to -8.8 and this number is very close to the negative square root of 77, then the answer is m