9x^2+28x+64=0

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Solution for 9x^2+28x+64=0 equation:


Simplifying
9x2 + 28x + 64 = 0

Reorder the terms:
64 + 28x + 9x2 = 0

Solving
64 + 28x + 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'.
7.111111111 + 3.111111111x + x2 = 0

Move the constant term to the right:

Add '-7.111111111' to each side of the equation.
7.111111111 + 3.111111111x + -7.111111111 + x2 = 0 + -7.111111111

Reorder the terms:
7.111111111 + -7.111111111 + 3.111111111x + x2 = 0 + -7.111111111

Combine like terms: 7.111111111 + -7.111111111 = 0.000000000
0.000000000 + 3.111111111x + x2 = 0 + -7.111111111
3.111111111x + x2 = 0 + -7.111111111

Combine like terms: 0 + -7.111111111 = -7.111111111
3.111111111x + x2 = -7.111111111

The x term is 3.111111111x.  Take half its coefficient (1.555555556).
Square it (2.419753088) and add it to both sides.

Add '2.419753088' to each side of the equation.
3.111111111x + 2.419753088 + x2 = -7.111111111 + 2.419753088

Reorder the terms:
2.419753088 + 3.111111111x + x2 = -7.111111111 + 2.419753088

Combine like terms: -7.111111111 + 2.419753088 = -4.691358023
2.419753088 + 3.111111111x + x2 = -4.691358023

Factor a perfect square on the left side:
(x + 1.555555556)(x + 1.555555556) = -4.691358023

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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