For f(x)=2x+1 and g(x)=x^2-7, find (f-g)(x)

a. x^2-2x-8
b. -x^2+2x+8
c. 2x^2-15
d. -x^2+2x-6

-x^2 +2x +8

Step-by-step explanation:

for f(x)=2x+1 and g(x)=x^2-7,

(f-g)(x) = 2x+1 -(x^2-7)

Distribute the minus sign

          = 2x+1 -x^2 +7

          = -x^2 +2x +8

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:

24 units

step-by-step explanation: