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Simplifying
2a2 + -121 = a2
Reorder the terms:
-121 + 2a2 = a2
Solving
-121 + 2a2 = a2
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '-1a2' to each side of the equation.
-121 + 2a2 + -1a2 = a2 + -1a2
Combine like terms: 2a2 + -1a2 = 1a2
-121 + 1a2 = a2 + -1a2
Combine like terms: a2 + -1a2 = 0
-121 + 1a2 = 0
Add '121' to each side of the equation.
-121 + 121 + 1a2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 1a2 = 0 + 121
1a2 = 0 + 121
Combine like terms: 0 + 121 = 121
1a2 = 121
Divide each side by '1'.
a2 = 121
Simplifying
a2 = 121
Take the square root of each side:
a = {-11, 11}
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