SOLUTION: If x=-1, and y=3 what is the value of the expression 3x(to the third) - 2xy I keep getting: 3(-1)to the third) -2(-1)(3) =-27- -6= -21 The answer isn"t right The choices fo

Question 281281: If x=-1, and y=3
what is the value of the expression 3x(to the third) - 2xy
I keep getting:
3(-1)to the third) -2(-1)(3)
=-27- -6= -21
The answer isn"t right
The choices for answers are: -9 , -3 , 3, 9, 21
they say the answer is 9... How?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
3x^3-2xy
3*(-1)^3-2*(-1)*(3)
-3+6=3
Either the answer 9 is wrong or you didn't copy the problem correctly

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