Answer:it is D)172 in the khan academy answers
Step-by-step explanation:
When you're trying to find something in the simplest form, you have to find a common denominator. The best way to do this is to find the factors.
Factors of 3= 1, 3
Factors of 28= 1,2,4,7,14,28
In this case, the lowest factor is one, which is what they are currently in.
Therefore, 3/28 is currently in its simplest form
We can plug those values into the equation, and if the answer is incorrect, we'll know if either one is extraneous.
√11 - 2(-7) = √(-7)^2 + 4(-7) + 4
√25 = √25
5 = 5
The first solution, -7, makes the equation true, and so it is not extraneous.
√11 - 2(1) = √(1)^2 + 4(1) + 4
√9 = √9
3 = 3
The second solution, 1, makes the equation true, and so it is also not extraneous.
<h3>The correct option is D, neither solution is extraneous. </h3>
The answer wold be 5(2)+5(7)
(2+4)/(-2-d) = -2
6 = -2(-2-d)
6 = 4 + 2d
2 = 2d
1 = d
