8x^2+40x+29=0

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Solution for 8x^2+40x+29=0 equation:


Simplifying
8x2 + 40x + 29 = 0

Reorder the terms:
29 + 40x + 8x2 = 0

Solving
29 + 40x + 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'.
3.625 + 5x + x2 = 0

Move the constant term to the right:

Add '-3.625' to each side of the equation.
3.625 + 5x + -3.625 + x2 = 0 + -3.625

Reorder the terms:
3.625 + -3.625 + 5x + x2 = 0 + -3.625

Combine like terms: 3.625 + -3.625 = 0.000
0.000 + 5x + x2 = 0 + -3.625
5x + x2 = 0 + -3.625

Combine like terms: 0 + -3.625 = -3.625
5x + x2 = -3.625

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -3.625 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -3.625 + 6.25

Combine like terms: -3.625 + 6.25 = 2.625
6.25 + 5x + x2 = 2.625

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 2.625

Calculate the square root of the right side: 1.620185175

Break this problem into two subproblems by setting 
(x + 2.5) equal to 1.620185175 and -1.620185175.

Subproblem 1

x + 2.5 = 1.620185175 Simplifying x + 2.5 = 1.620185175 Reorder the terms: 2.5 + x = 1.620185175 Solving 2.5 + x = 1.620185175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 1.620185175 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 1.620185175 + -2.5 x = 1.620185175 + -2.5 Combine like terms: 1.620185175 + -2.5 = -0.879814825 x = -0.879814825 Simplifying x = -0.879814825

Subproblem 2

x + 2.5 = -1.620185175 Simplifying x + 2.5 = -1.620185175 Reorder the terms: 2.5 + x = -1.620185175 Solving 2.5 + x = -1.620185175 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -1.620185175 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -1.620185175 + -2.5 x = -1.620185175 + -2.5 Combine like terms: -1.620185175 + -2.5 = -4.120185175 x = -4.120185175 Simplifying x = -4.120185175

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.879814825, -4.120185175}

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