What is the definition of Rational number

A rational number is a number in mathematics that can be expressed as the quotient or fraction p / q of two integers, a numerator p and a denominator q that is non-zero.

Step-by-step explanation:

let me know if im wrong

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function

zero

step-by-step explanation:

f(2)= x-2

plug in the 2 in the "x"

f(2)=2-2

f(2)=0