SOLUTION: Will someone assist me in setting up this math problem so I can solve for x ? the question is: Evaluate each polynomial for x=3 and for x= -3. 1/3x^4 - 2x^3 thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Will someone assist me in setting up this math problem so I can solve for x ? the question is: Evaluate each polynomial for x=3 and for x= -3. 1/3x^4 - 2x^3 thank you      Log On


   

Question 454857: Will someone assist me in setting up this math problem so I can solve for x ?
the question is: Evaluate each polynomial for x=3 and for x= -3.
1/3x^4 - 2x^3
thank you
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

Evaluate each polynomial for x=3 and for x=+-3.

for x=3:
%281%2F3%29x%5E4+-+2x%5E3
=%281%2F3%293%5E4+-+2%2A3%5E3
=%281%2F3%2981+-+2%2A27
=81%2F3+-+54
=27+-+54
=-27
for x=-3:
%281%2F3%29x%5E4+-+2x%5E3
=%281%2F3%29%28-3%29%5E4+-+2%2A%28-3%29%5E3
=%281%2F3%2981+-+2%2A%28-27%29
=81%2F3+%2B+54
=27+%2B+54
=81