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Simplifying
3a2 + -2 = 19
Reorder the terms:
-2 + 3a2 = 19
Solving
-2 + 3a2 = 19
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '2' to each side of the equation.
-2 + 2 + 3a2 = 19 + 2
Combine like terms: -2 + 2 = 0
0 + 3a2 = 19 + 2
3a2 = 19 + 2
Combine like terms: 19 + 2 = 21
3a2 = 21
Divide each side by '3'.
a2 = 7
Simplifying
a2 = 7
Take the square root of each side:
a = {-2.645751311, 2.645751311}
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