Answer:
{4 + 2√3, 4 - 2√3} thus the solution is A. x = 4 + 2 sqrt(3) or x = 4 - 2 sqrt(3)
Step-by-step explanation:
Solve for x over the real numbers:
(x - 4)^2 = 12
Take the square root of both sides:
x - 4 = 2 sqrt(3) or x - 4 = -2 sqrt(3)
Add 4 to both sides:
x = 4 + 2 sqrt(3) or x - 4 = -2 sqrt(3)
Add 4 to both sides:
Answer: x = 4 + 2 sqrt(3) or x = 4 - 2 sqrt(3)
Answer: C) 9.8 pounds
Step-by-step explanation:
We add the positive additions of nails: 12 + 2 1/2 = 14 1/2 pounds of nails
We subtract the negative subtractions of nails: 14 1/2 - 1 1/4 - 3 9/20 = 9.8 pounds of nails.
Lets solve it
first multiply each term by x :-
x^2 - 7 = 6x
x^2 - 6x - 7 = 0
(x - 7)(x + 1) = 0
x = 7 and x = -1
The answer to number one is C
and the answer to number two is A
I have a doubt with the first. That can be correct if is the same that ln(ab)^2-ln a.
The second is correct.
The third is correct. Remember xlny=ln(y^x).
The number four is not correct. Only is equal to the first two terms.
The number five is not correct. Is the same that number four.
Good luck!