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Simplifying
9a2 + -36 = 0
Reorder the terms:
-36 + 9a2 = 0
Solving
-36 + 9a2 = 0
Solving for variable 'a'.
Move all terms containing a to the left, all other terms to the right.
Add '36' to each side of the equation.
-36 + 36 + 9a2 = 0 + 36
Combine like terms: -36 + 36 = 0
0 + 9a2 = 0 + 36
9a2 = 0 + 36
Combine like terms: 0 + 36 = 36
9a2 = 36
Divide each side by '9'.
a2 = 4
Simplifying
a2 = 4
Take the square root of each side:
a = {-2, 2}
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