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Simplifying
-2a2 + -9 = -16
Reorder the terms:
-9 + -2a2 = -16
Solving
-9 + -2a2 = -16
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 = -16 + 9
Combine like terms: -9 + 9 = 0
0 + -2a2 = -16 + 9
-2a2 = -16 + 9
Combine like terms: -16 + 9 = -7
-2a2 = -7
Divide each side by '-2'.
a2 = 3.5
Simplifying
a2 = 3.5
Take the square root of each side:
a = {-1.870828693, 1.870828693}
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