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Simplifying
2a2 + -9 = 0
Reorder the terms:
-9 + 2a2 = 0
Solving
-9 + 2a2 = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 2a2 = 0 + 9
Combine like terms: -9 + 9 = 0
0 + 2a2 = 0 + 9
2a2 = 0 + 9
Combine like terms: 0 + 9 = 9
2a2 = 9
Divide each side by '2'.
a2 = 4.5
Simplifying
a2 = 4.5
Take the square root of each side:
a = {-2.121320344, 2.121320344}
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