(x+12)+(5x^2+8)=16

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Solution for (x+12)+(5x^2+8)=16 equation:


Simplifying
(x + 12) + (5x2 + 8) = 16

Reorder the terms:
(12 + x) + (5x2 + 8) = 16

Remove parenthesis around (12 + x)
12 + x + (5x2 + 8) = 16

Reorder the terms:
12 + x + (8 + 5x2) = 16

Remove parenthesis around (8 + 5x2)
12 + x + 8 + 5x2 = 16

Reorder the terms:
12 + 8 + x + 5x2 = 16

Combine like terms: 12 + 8 = 20
20 + x + 5x2 = 16

Solving
20 + x + 5x2 = 16

Solving for variable 'x'.

Reorder the terms:
20 + -16 + x + 5x2 = 16 + -16

Combine like terms: 20 + -16 = 4
4 + x + 5x2 = 16 + -16

Combine like terms: 16 + -16 = 0
4 + x + 5x2 = 0

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

Divide each side by '5'.
0.8 + 0.2x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + 0.2x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + 0.2x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 0.2x + x2 = 0 + -0.8
0.2x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
0.2x + x2 = -0.8

The x term is x.  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.
0.2x + 0.25 + x2 = -0.8 + 0.25

Reorder the terms:
0.25 + 0.2x + x2 = -0.8 + 0.25

Combine like terms: -0.8 + 0.25 = -0.55
0.25 + 0.2x + x2 = -0.55

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -0.55

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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