What are the roots of the quadratic?
-3 and 0
-3 and 1
-1 and 3
-1 and -3

Pls! does anybody know a shortcut for answering these types of questions in the future?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Given that abcd is a rhombus, what is the value of x?