169-a^2=

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Solution for 169-a^2= equation: 


Simplifying
169 + -1a2 = 0

Solving
169 + -1a2 = 0

Solving for variable 'a'.

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

Add '-169' to each side of the equation.
169 + -169 + -1a2 = 0 + -169

Combine like terms: 169 + -169 = 0
0 + -1a2 = 0 + -169
-1a2 = 0 + -169

Combine like terms: 0 + -169 = -169
-1a2 = -169

Divide each side by '-1'.
a2 = 169

Simplifying
a2 = 169

Take the square root of each side:
a = {-13, 13}

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