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Simplifying
(3x2 + -5) + -16 = 0
Reorder the terms:
(-5 + 3x2) + -16 = 0
Remove parenthesis around (-5 + 3x2)
-5 + 3x2 + -16 = 0
Reorder the terms:
-5 + -16 + 3x2 = 0
Combine like terms: -5 + -16 = -21
-21 + 3x2 = 0
Solving
-21 + 3x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '21' to each side of the equation.
-21 + 21 + 3x2 = 0 + 21
Combine like terms: -21 + 21 = 0
0 + 3x2 = 0 + 21
3x2 = 0 + 21
Combine like terms: 0 + 21 = 21
3x2 = 21
Divide each side by '3'.
x2 = 7
Simplifying
x2 = 7
Take the square root of each side:
x = {-2.645751311, 2.645751311}
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