If using the method of completing the square to solve the quadratic equation x^2-2x-1=0x 2 −2x−1=0, which number would have to be added to "complete the square"

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

What are the excluded values? m+5/mn+3m