-a^2+49=0

Solution for -a^2+49=0 equation:

Simplifying
-1a2 + 49 = 0

Reorder the terms:
49 + -1a2 = 0

Solving
49 + -1a2 = 0

Solving for variable 'a'.

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

Add '-49' to each side of the equation.
49 + -49 + -1a2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -1a2 = 0 + -49
-1a2 = 0 + -49

Combine like terms: 0 + -49 = -49
-1a2 = -49

Divide each side by '-1'.
a2 = 49

Simplifying
a2 = 49

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