8x^2+9x+12=0

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


Simplifying
8x2 + 9x + 12 = 0

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

Solving
12 + 9x + 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'.
1.5 + 1.125x + x2 = 0

Move the constant term to the right:

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

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

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 1.125x + x2 = 0 + -1.5
1.125x + x2 = 0 + -1.5

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

The x term is 1.125x.  Take half its coefficient (0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
1.125x + 0.31640625 + x2 = -1.5 + 0.31640625

Reorder the terms:
0.31640625 + 1.125x + x2 = -1.5 + 0.31640625

Combine like terms: -1.5 + 0.31640625 = -1.18359375
0.31640625 + 1.125x + x2 = -1.18359375

Factor a perfect square on the left side:
(x + 0.5625)(x + 0.5625) = -1.18359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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