To evaluate a function at a given input, you have to substitute every occurrence of the variable with that particular value.
So, for the first function, you have

The name of the variable is obviously irrelelvant, so the same goes for the second function:

0.8 or 4/5
Both are correct, but in different form.
Your welcome.
Answer:
x = 2,−6
Step-by-step explanation:
Move all terms to the left side and set equal to zero. Then set each factor equal to zero
Answer:
2*34
Step-by-step explanation: