5x^2+29x+84=0

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Solution for 5x^2+29x+84=0 equation:


Simplifying
5x2 + 29x + 84 = 0

Reorder the terms:
84 + 29x + 5x2 = 0

Solving
84 + 29x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
16.8 + 5.8x + x2 = 0

Move the constant term to the right:

Add '-16.8' to each side of the equation.
16.8 + 5.8x + -16.8 + x2 = 0 + -16.8

Reorder the terms:
16.8 + -16.8 + 5.8x + x2 = 0 + -16.8

Combine like terms: 16.8 + -16.8 = 0.0
0.0 + 5.8x + x2 = 0 + -16.8
5.8x + x2 = 0 + -16.8

Combine like terms: 0 + -16.8 = -16.8
5.8x + x2 = -16.8

The x term is 5.8x.  Take half its coefficient (2.9).
Square it (8.41) and add it to both sides.

Add '8.41' to each side of the equation.
5.8x + 8.41 + x2 = -16.8 + 8.41

Reorder the terms:
8.41 + 5.8x + x2 = -16.8 + 8.41

Combine like terms: -16.8 + 8.41 = -8.39
8.41 + 5.8x + x2 = -8.39

Factor a perfect square on the left side:
(x + 2.9)(x + 2.9) = -8.39

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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