Answer: x=-3
Step-by-step explanation:
move -9 over to -12 and the 9 becomes positive and then add -12+9 and your answer will be negative
Answer:
A
Step-by-step explanation:
Answer:
X = 6
Step-by-step explanation:
4x - 2 = 3x + 4 /subtract -3x
x - 2 = 4 /add 2
x = 6
For this case we have that by definition, the domain of a function, is given for all the values for which the function is defined.
We have:
![f (x) = \frac {x + 1} {x ^ 2-6x + 8}](https://tex.z-dn.net/?f=f%20%28x%29%20%3D%20%5Cfrac%20%7Bx%20%2B%201%7D%20%7Bx%20%5E%202-6x%20%2B%208%7D)
The given function is not defined when the denominator is equal to zero. That is to say:
![x ^ 2-6x + 8 = 0](https://tex.z-dn.net/?f=x%20%5E%202-6x%20%2B%208%20%3D%200)
To find the roots we factor, we look for two numbers that when multiplied give as a result "8" and when added as a result "-6". These numbers are:
![-4-2 = -6\\-4 * -2 = 8](https://tex.z-dn.net/?f=-4-2%20%3D%20-6%5C%5C-4%20%2A%20-2%20%3D%208)
Thus, the factored polynomial is:
![(x-4) (x-2) = 0](https://tex.z-dn.net/?f=%28x-4%29%20%28x-2%29%20%3D%200)
That is to say:
![x_ {1} = 4\\x_ {2} = 2](https://tex.z-dn.net/?f=x_%20%7B1%7D%20%3D%204%5C%5Cx_%20%7B2%7D%20%3D%202)
Makes the denominator of the function 0.
Then the domain is given by:
All real numbers, except 2 and 4.
Answer:
x |x≠2,4