4x^2+5x-635=0

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Solution for 4x^2+5x-635=0 equation:


Simplifying
4x2 + 5x + -635 = 0

Reorder the terms:
-635 + 5x + 4x2 = 0

Solving
-635 + 5x + 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'.
-158.75 + 1.25x + x2 = 0

Move the constant term to the right:

Add '158.75' to each side of the equation.
-158.75 + 1.25x + 158.75 + x2 = 0 + 158.75

Reorder the terms:
-158.75 + 158.75 + 1.25x + x2 = 0 + 158.75

Combine like terms: -158.75 + 158.75 = 0.00
0.00 + 1.25x + x2 = 0 + 158.75
1.25x + x2 = 0 + 158.75

Combine like terms: 0 + 158.75 = 158.75
1.25x + x2 = 158.75

The x term is 1.25x.  Take half its coefficient (0.625).
Square it (0.390625) and add it to both sides.

Add '0.390625' to each side of the equation.
1.25x + 0.390625 + x2 = 158.75 + 0.390625

Reorder the terms:
0.390625 + 1.25x + x2 = 158.75 + 0.390625

Combine like terms: 158.75 + 0.390625 = 159.140625
0.390625 + 1.25x + x2 = 159.140625

Factor a perfect square on the left side:
(x + 0.625)(x + 0.625) = 159.140625

Calculate the square root of the right side: 12.615095124

Break this problem into two subproblems by setting 
(x + 0.625) equal to 12.615095124 and -12.615095124.

Subproblem 1

x + 0.625 = 12.615095124 Simplifying x + 0.625 = 12.615095124 Reorder the terms: 0.625 + x = 12.615095124 Solving 0.625 + x = 12.615095124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = 12.615095124 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = 12.615095124 + -0.625 x = 12.615095124 + -0.625 Combine like terms: 12.615095124 + -0.625 = 11.990095124 x = 11.990095124 Simplifying x = 11.990095124

Subproblem 2

x + 0.625 = -12.615095124 Simplifying x + 0.625 = -12.615095124 Reorder the terms: 0.625 + x = -12.615095124 Solving 0.625 + x = -12.615095124 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.625' to each side of the equation. 0.625 + -0.625 + x = -12.615095124 + -0.625 Combine like terms: 0.625 + -0.625 = 0.000 0.000 + x = -12.615095124 + -0.625 x = -12.615095124 + -0.625 Combine like terms: -12.615095124 + -0.625 = -13.240095124 x = -13.240095124 Simplifying x = -13.240095124

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.990095124, -13.240095124}

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