Can someone explain how to do this?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

If benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

Which of the following best describes the delian problem?