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Simplifying
-1x2 + 16 + 5 = 0
Reorder the terms:
16 + 5 + -1x2 = 0
Combine like terms: 16 + 5 = 21
21 + -1x2 = 0
Solving
21 + -1x2 = 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 + -1x2 = 0 + -21
Combine like terms: 21 + -21 = 0
0 + -1x2 = 0 + -21
-1x2 = 0 + -21
Combine like terms: 0 + -21 = -21
-1x2 = -21
Divide each side by '-1'.
x2 = 21
Simplifying
x2 = 21
Take the square root of each side:
x = {-4.582575695, 4.582575695}
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