• use calculator equations

• get a good night sleep

• try to stay calm under the time constraints

• go with your first gut reaction

• if you do not know the answer to a question, skip it

• resolve the questions you skipped before time runs out

try unplugging and then plugging back in your calculator.

make sure your calculator is turned on and nothing is running before attempting to download again.

to prevent non-real answers for the quadratic equation, ensure that the value of b^2 - 4ac (also known as the discriminant) is greater than zero. If b^2 - 4ac is less than zero the overall result will be non-real (the value within the square root is negative).