Match the number with its opposite one number for each one. 3.2 a 2.3 -2.3 b -3.2. -1.5 c 1.5 5.1 d 5.1

3.2=-3.2

2.3=-2.3

1.5=-1.5

5.1=-5.1

3x^3-x^2+6x-9

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: