Question

help please im on a time limit

Answer 1

What is the solution of n^2 - 49 = 0?

A.) -7
B.) 7
C.) positive or negitive 7
D.) no solution

Answer 2

C

Answer 3

\[n^2 - 49=0\]
The only way to solve this, is by adding 49 to both sides:
\[n^2=49\]
And to get rid of the exponent, we take the square root on both sides, now when we deal with a exponent squared, our solution can be plus or minus (negative or positive) because of the "squared" variable, because any negative number squared becomes positive:
\[n=\pm \sqrt{}49\]
therefore:
\[n= \pm 7\]

Answer 4

thanks