1. The problem statement, all variables and given/known data Hello, I have to use the HP 10s calculator at my university, I have been used to my modern casio for the last 4 years but I have a problem. The square root symbol when pressed does not allow for continual calculation, such as when I am using the quadratic formula. It seems to only take the square root of the first in-putted integer then does not continue the radical. (Such as like on any Casio fx, you would press the right cursor to get out of the root and end your radicand). On this thing, it just takes the root of the first number! How do I keep the radical going for continual calculation?? Exam tomorrow, panic mode has started!! 2. Relevant equations For this example, I was trying to use b^2-4ac under the radical, where a=1, b=4, c=-21 3. The attempt at a solution I have attempted nested parenthesis, parenthesis raised to the power of 1/2. I have included two images that might show you what I mean. Thanks for your help in advance.