I am pretty sure number 3 is the right answer
-36x+30
-24x+20
-18x+15
-12x+10
2x^2=4x
I'm pretty sure this is it because there are only 2 like terms so you can't combine anything with 4x.
Answer:
x = 4 ±
Step-by-step explanation:
Given
x² - 8x = 3
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(- 4)x + 16 = 3 + 16
(x - 4)² = 19 ( take the square root of both sides )
x - 4 = ± ( add 4 to both sides )
x = 4 ±
It is a function because in a function the x's do not repeat. So since there are no two numbers in the x column that are the same, yes it is a function.