2S^2+S+8=0

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Solution for 2S^2+S+8=0 equation:


Simplifying
2S2 + S + 8 = 0

Reorder the terms:
8 + S + 2S2 = 0

Solving
8 + S + 2S2 = 0

Solving for variable 'S'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
4 + 0.5S + S2 = 0

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 0.5S + -4 + S2 = 0 + -4

Reorder the terms:
4 + -4 + 0.5S + S2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 0.5S + S2 = 0 + -4
0.5S + S2 = 0 + -4

Combine like terms: 0 + -4 = -4
0.5S + S2 = -4

The S term is S.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.5S + 0.25 + S2 = -4 + 0.25

Reorder the terms:
0.25 + 0.5S + S2 = -4 + 0.25

Combine like terms: -4 + 0.25 = -3.75
0.25 + 0.5S + S2 = -3.75

Factor a perfect square on the left side:
(S + 0.5)(S + 0.5) = -3.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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