3x^2+5x+12=9x+8

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Solution for 3x^2+5x+12=9x+8 equation: 


Simplifying
3x2 + 5x + 12 = 9x + 8

Reorder the terms:
12 + 5x + 3x2 = 9x + 8

Reorder the terms:
12 + 5x + 3x2 = 8 + 9x

Solving
12 + 5x + 3x2 = 8 + 9x

Solving for variable 'x'.

Reorder the terms:
12 + -8 + 5x + -9x + 3x2 = 8 + 9x + -8 + -9x

Combine like terms: 12 + -8 = 4
4 + 5x + -9x + 3x2 = 8 + 9x + -8 + -9x

Combine like terms: 5x + -9x = -4x
4 + -4x + 3x2 = 8 + 9x + -8 + -9x

Reorder the terms:
4 + -4x + 3x2 = 8 + -8 + 9x + -9x

Combine like terms: 8 + -8 = 0
4 + -4x + 3x2 = 0 + 9x + -9x
4 + -4x + 3x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
4 + -4x + 3x2 = 0

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

Divide each side by '3'.
1.333333333 + -1.333333333x + x2 = 0

Move the constant term to the right:

Add '-1.333333333' to each side of the equation.
1.333333333 + -1.333333333x + -1.333333333 + x2 = 0 + -1.333333333

Reorder the terms:
1.333333333 + -1.333333333 + -1.333333333x + x2 = 0 + -1.333333333

Combine like terms: 1.333333333 + -1.333333333 = 0.000000000
0.000000000 + -1.333333333x + x2 = 0 + -1.333333333
-1.333333333x + x2 = 0 + -1.333333333

Combine like terms: 0 + -1.333333333 = -1.333333333
-1.333333333x + x2 = -1.333333333

The x term is -1.333333333x.  Take half its coefficient (-0.6666666665).
Square it (0.4444444442) and add it to both sides.

Add '0.4444444442' to each side of the equation.
-1.333333333x + 0.4444444442 + x2 = -1.333333333 + 0.4444444442

Reorder the terms:
0.4444444442 + -1.333333333x + x2 = -1.333333333 + 0.4444444442

Combine like terms: -1.333333333 + 0.4444444442 = -0.8888888888
0.4444444442 + -1.333333333x + x2 = -0.8888888888

Factor a perfect square on the left side:
(x + -0.6666666665)(x + -0.6666666665) = -0.8888888888

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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