The polynomial function f(x) is a fourth degree polynomial which of the following could be the complete list of the roots of f(x)?
3,4,5,6
3,4,5,6i
3,4,4+isqrt(6),5+sqrt(6)
3,4,5+i,-5+i

How do you find p(a and b) if a and b are independent events for two or more actions, such as tossing a coin twice and finding p(heads and heads)? 2. how do you find p(a or b) if a and b are independent events for one action, such as spinning a four-color spinner once and finding p(red or blue)?