8x^2+25x-29=0

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Solution for 8x^2+25x-29=0 equation:


Simplifying
8x2 + 25x + -29 = 0

Reorder the terms:
-29 + 25x + 8x2 = 0

Solving
-29 + 25x + 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 + 3.125x + x2 = 0

Move the constant term to the right:

Add '3.625' to each side of the equation.
-3.625 + 3.125x + 3.625 + x2 = 0 + 3.625

Reorder the terms:
-3.625 + 3.625 + 3.125x + x2 = 0 + 3.625

Combine like terms: -3.625 + 3.625 = 0.000
0.000 + 3.125x + x2 = 0 + 3.625
3.125x + x2 = 0 + 3.625

Combine like terms: 0 + 3.625 = 3.625
3.125x + x2 = 3.625

The x term is 3.125x.  Take half its coefficient (1.5625).
Square it (2.44140625) and add it to both sides.

Add '2.44140625' to each side of the equation.
3.125x + 2.44140625 + x2 = 3.625 + 2.44140625

Reorder the terms:
2.44140625 + 3.125x + x2 = 3.625 + 2.44140625

Combine like terms: 3.625 + 2.44140625 = 6.06640625
2.44140625 + 3.125x + x2 = 6.06640625

Factor a perfect square on the left side:
(x + 1.5625)(x + 1.5625) = 6.06640625

Calculate the square root of the right side: 2.463007562

Break this problem into two subproblems by setting 
(x + 1.5625) equal to 2.463007562 and -2.463007562.

Subproblem 1

x + 1.5625 = 2.463007562 Simplifying x + 1.5625 = 2.463007562 Reorder the terms: 1.5625 + x = 2.463007562 Solving 1.5625 + x = 2.463007562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5625' to each side of the equation. 1.5625 + -1.5625 + x = 2.463007562 + -1.5625 Combine like terms: 1.5625 + -1.5625 = 0.0000 0.0000 + x = 2.463007562 + -1.5625 x = 2.463007562 + -1.5625 Combine like terms: 2.463007562 + -1.5625 = 0.900507562 x = 0.900507562 Simplifying x = 0.900507562

Subproblem 2

x + 1.5625 = -2.463007562 Simplifying x + 1.5625 = -2.463007562 Reorder the terms: 1.5625 + x = -2.463007562 Solving 1.5625 + x = -2.463007562 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.5625' to each side of the equation. 1.5625 + -1.5625 + x = -2.463007562 + -1.5625 Combine like terms: 1.5625 + -1.5625 = 0.0000 0.0000 + x = -2.463007562 + -1.5625 x = -2.463007562 + -1.5625 Combine like terms: -2.463007562 + -1.5625 = -4.025507562 x = -4.025507562 Simplifying x = -4.025507562

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.900507562, -4.025507562}

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