4x^2+25x-2=0

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Solution for 4x^2+25x-2=0 equation:


Simplifying
4x2 + 25x + -2 = 0

Reorder the terms:
-2 + 25x + 4x2 = 0

Solving
-2 + 25x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-0.5 + 6.25x + x2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 6.25x + 0.5 + x2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 6.25x + x2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 6.25x + x2 = 0 + 0.5
6.25x + x2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
6.25x + x2 = 0.5

The x term is 6.25x.  Take half its coefficient (3.125).
Square it (9.765625) and add it to both sides.

Add '9.765625' to each side of the equation.
6.25x + 9.765625 + x2 = 0.5 + 9.765625

Reorder the terms:
9.765625 + 6.25x + x2 = 0.5 + 9.765625

Combine like terms: 0.5 + 9.765625 = 10.265625
9.765625 + 6.25x + x2 = 10.265625

Factor a perfect square on the left side:
(x + 3.125)(x + 3.125) = 10.265625

Calculate the square root of the right side: 3.204001404

Break this problem into two subproblems by setting 
(x + 3.125) equal to 3.204001404 and -3.204001404.

Subproblem 1

x + 3.125 = 3.204001404 Simplifying x + 3.125 = 3.204001404 Reorder the terms: 3.125 + x = 3.204001404 Solving 3.125 + x = 3.204001404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.125' to each side of the equation. 3.125 + -3.125 + x = 3.204001404 + -3.125 Combine like terms: 3.125 + -3.125 = 0.000 0.000 + x = 3.204001404 + -3.125 x = 3.204001404 + -3.125 Combine like terms: 3.204001404 + -3.125 = 0.079001404 x = 0.079001404 Simplifying x = 0.079001404

Subproblem 2

x + 3.125 = -3.204001404 Simplifying x + 3.125 = -3.204001404 Reorder the terms: 3.125 + x = -3.204001404 Solving 3.125 + x = -3.204001404 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.125' to each side of the equation. 3.125 + -3.125 + x = -3.204001404 + -3.125 Combine like terms: 3.125 + -3.125 = 0.000 0.000 + x = -3.204001404 + -3.125 x = -3.204001404 + -3.125 Combine like terms: -3.204001404 + -3.125 = -6.329001404 x = -6.329001404 Simplifying x = -6.329001404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.079001404, -6.329001404}

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