Solve the equation for x

What is the length of bc ? enter your answer in the box.bc =

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?