Which statement best describes how to determine wether f(x)=x^4-x^3 is an even function?

option 1: determine whether   (-x)^4 - (-x)^3 is equivalent to f(x)=x^4-x^3

step-by-step explanation:

first of all we will define the even function:

an even function is a function in which

f(-x) = f(x)

theoretically, putting -x in place of x gives the same original function.

so, for the given function:

f(x)=x^4-x^3

f(-x) = (-x)^4 - (-x)^3 should be equal to the original function f(x)=x^4-x^3

hence, option 1 is correct ..

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

c

step-by-step explanation: