What is the intermediate step in the form (x + a)^2 = b as a result of completing the square for the following equation?
x^2 - 6x= -156

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is