The first term of a geometric sequence is –2 and the common -1/4. what are the next three terms of the sequence?

Could somebody me with this radical simplification?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

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