8x^2+9x+20=0

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Solution for 8x^2+9x+20=0 equation:


Simplifying
8x2 + 9x + 20 = 0

Reorder the terms:
20 + 9x + 8x2 = 0

Solving
20 + 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'.
2.5 + 1.125x + x2 = 0

Move the constant term to the right:

Add '-2.5' to each side of the equation.
2.5 + 1.125x + -2.5 + x2 = 0 + -2.5

Reorder the terms:
2.5 + -2.5 + 1.125x + x2 = 0 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + 1.125x + x2 = 0 + -2.5
1.125x + x2 = 0 + -2.5

Combine like terms: 0 + -2.5 = -2.5
1.125x + x2 = -2.5

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 = -2.5 + 0.31640625

Reorder the terms:
0.31640625 + 1.125x + x2 = -2.5 + 0.31640625

Combine like terms: -2.5 + 0.31640625 = -2.18359375
0.31640625 + 1.125x + x2 = -2.18359375

Factor a perfect square on the left side:
(x + 0.5625)(x + 0.5625) = -2.18359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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