9x^2+9x+40=0

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Solution for 9x^2+9x+40=0 equation:


Simplifying
9x2 + 9x + 40 = 0

Reorder the terms:
40 + 9x + 9x2 = 0

Solving
40 + 9x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
4.444444444 + x + x2 = 0

Move the constant term to the right:

Add '-4.444444444' to each side of the equation.
4.444444444 + x + -4.444444444 + x2 = 0 + -4.444444444

Reorder the terms:
4.444444444 + -4.444444444 + x + x2 = 0 + -4.444444444

Combine like terms: 4.444444444 + -4.444444444 = 0.000000000
0.000000000 + x + x2 = 0 + -4.444444444
x + x2 = 0 + -4.444444444

Combine like terms: 0 + -4.444444444 = -4.444444444
x + x2 = -4.444444444

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.
 + 0.25 + x2 = -4.444444444 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = -4.444444444 + 0.25

Combine like terms: -4.444444444 + 0.25 = -4.194444444
1.25 + x2 = -4.194444444

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = -4.194444444

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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