What would be the quickest method to estimate (i.e to the nearest integer) the value of $\displaystyle 3\sqrt{-89}$?
If 89 has a factor of 3 it wouldn't be too bad but given that its a prime this question seems a little difficult.
thx
What would be the quickest method to estimate (i.e to the nearest integer) the value of $\displaystyle 3\sqrt{-89}$?
If 89 has a factor of 3 it wouldn't be too bad but given that its a prime this question seems a little difficult.
thx
The fact that you wrote "$\displaystyle 3\sqrt{-89}$" and titled this "Finding the value of a square root" made it very difficult for people to figure out that you really wanted the cube root, $\displaystyle \sqrt[3]{-89}$.
$\displaystyle -4^3= -64$ and $\displaystyle -5^3= -125$ so the cube root of -89 is between -4 and -5.