8x^2+12x+9=0

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Solution for 8x^2+12x+9=0 equation:


Simplifying
8x2 + 12x + 9 = 0

Reorder the terms:
9 + 12x + 8x2 = 0

Solving
9 + 12x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
1.125 + 1.5x + x2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + 1.5x + -1.125 + x2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + 1.5x + x2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + 1.5x + x2 = 0 + -1.125
1.5x + x2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
1.5x + x2 = -1.125

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = -1.125 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = -1.125 + 0.5625

Combine like terms: -1.125 + 0.5625 = -0.5625
0.5625 + 1.5x + x2 = -0.5625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = -0.5625

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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