Calculate the discriminant.
x2 – x – 2 = 0

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

Abag contains 10 white golf balls and 6 striped golf balls. a golfer wants to add 112 golf balls to the bag. he wants the ratio of white to striped gold balls to remain the same. how many of each should he add?

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2