SOLUTION: I am heading back to college and I am preparing for compass test. Needing help with sample question please... Question is... If x = -1 and y = 2, what is the value of the expressi

Algebra ->  Expressions-with-variables -> SOLUTION: I am heading back to college and I am preparing for compass test. Needing help with sample question please... Question is... If x = -1 and y = 2, what is the value of the expressi      Log On


   

Question 48852: I am heading back to college and I am preparing for compass test. Needing help with sample question please... Question is... If x = -1 and y = 2, what is the value of the expression 2x^3 - 3xy? My answer choices are (a) 8 (b) 4 (c) -1 (d) -4 (e) -8 I am terrible at math, especially algebra, if you can explain this I would greatly appreciate it. Also, if you know of a website that I could study on I would appreciate that information. Have a Great Day - Krystal
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
x = -1 while y = 2
2x%5E3+-+3xy
2%28-1%29%5E3+-+3%28-1%29%282%29
2%28-1%29%28-1%29%28-1%29+-+3%28-1%29%282%29
-2+%2B+6
4
I do not know much about other sites, but, if you need help, I would advise you to look at the tutor's lessons.