Answer:
1. x = +/- 2
- 7
2. x =
+/- 
3. n =
+/- 
Step-by-step explanation:
1. Divide both sides by 2: (x + 7)^2 = 8
Square root both sides: x + 7 = +/- 2
Subtract 7 from both sides: x = +/- 2
- 7
2. Square root both sides: x - 3 = 
Since there is a negative inside the radical, we need to have an imaginary number:
. So, 
Add 3 to both sides: x =
+/- 
3. Divide by -5 from both sides: (n - 2)^2 = -2
Square root both sides: n - 2 = 
Again, we have to use i: 
Add 2 to both sides: n =
+/- 
Hope this helps!
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Answer:
x = 3
Step-by-step explanation:
First, simplify by subtracting 2x from 6x:
6x - 2x + 8 = 20
4x + 8 = 20
Then, solve for x:
4x + 8 = 20
4x = 12
x = 3
So, the answer is x = 3
Answer: -18, -15, -5, 0, 9, 18