SOLUTION: I know this is pretty simple, but I can't seem to come up with the same answer that is given: 'if x=-1 and y=2, what is the value of the expression 2x to the third power-3xy?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I know this is pretty simple, but I can't seem to come up with the same answer that is given: 'if x=-1 and y=2, what is the value of the expression 2x to the third power-3xy?       Log On


   

Question 580103: I know this is pretty simple, but I can't seem to come up with the same answer that is given:
'if x=-1 and y=2, what is the value of the expression 2x to the third power-3xy?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
if x=-1 and y=2, what is the value of the expression 2x^3 - 3xy
Substitute -1 for x and 2 for y
2(-1^3) - (3*-1*2)
2(-1) - (-6)
-2 + 6 = +4