Question

What is the solution of n^2-49=0?
-7
7
+-7
No solution

Answer 1

Simplifying
n2 + -49 = 0

Reorder the terms:
-49 + n2 = 0

Solving
-49 + n2 = 0

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '49' to each side of the equation.
-49 + 49 + n2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + n2 = 0 + 49
n2 = 0 + 49

Combine like terms: 0 + 49 = 49
n2 = 49

Simplifying
n2 = 49

Take the square root of each side:
n = {-7, 7}