4x^2+x-360000=0

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Solution for 4x^2+x-360000=0 equation:


Simplifying
4x2 + x + -360000 = 0

Reorder the terms:
-360000 + x + 4x2 = 0

Solving
-360000 + x + 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'.
-90000 + 0.25x + x2 = 0

Move the constant term to the right:

Add '90000' to each side of the equation.
-90000 + 0.25x + 90000 + x2 = 0 + 90000

Reorder the terms:
-90000 + 90000 + 0.25x + x2 = 0 + 90000

Combine like terms: -90000 + 90000 = 0
0 + 0.25x + x2 = 0 + 90000
0.25x + x2 = 0 + 90000

Combine like terms: 0 + 90000 = 90000
0.25x + x2 = 90000

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.25x + 0.25 + x2 = 90000 + 0.25

Reorder the terms:
0.25 + 0.25x + x2 = 90000 + 0.25

Combine like terms: 90000 + 0.25 = 90000.25
0.25 + 0.25x + x2 = 90000.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 90000.25

Calculate the square root of the right side: 300.000416666

Break this problem into two subproblems by setting 
(x + 0.5) equal to 300.000416666 and -300.000416666.

Subproblem 1

x + 0.5 = 300.000416666 Simplifying x + 0.5 = 300.000416666 Reorder the terms: 0.5 + x = 300.000416666 Solving 0.5 + x = 300.000416666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 300.000416666 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 300.000416666 + -0.5 x = 300.000416666 + -0.5 Combine like terms: 300.000416666 + -0.5 = 299.500416666 x = 299.500416666 Simplifying x = 299.500416666

Subproblem 2

x + 0.5 = -300.000416666 Simplifying x + 0.5 = -300.000416666 Reorder the terms: 0.5 + x = -300.000416666 Solving 0.5 + x = -300.000416666 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -300.000416666 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -300.000416666 + -0.5 x = -300.000416666 + -0.5 Combine like terms: -300.000416666 + -0.5 = -300.500416666 x = -300.500416666 Simplifying x = -300.500416666

Solution

The solution to the problem is based on the solutions from the subproblems. x = {299.500416666, -300.500416666}

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