x^2+4x-7500=0

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Solution for x^2+4x-7500=0 equation:


Simplifying
x2 + 4x + -7500 = 0

Reorder the terms:
-7500 + 4x + x2 = 0

Solving
-7500 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '7500' to each side of the equation.
-7500 + 4x + 7500 + x2 = 0 + 7500

Reorder the terms:
-7500 + 7500 + 4x + x2 = 0 + 7500

Combine like terms: -7500 + 7500 = 0
0 + 4x + x2 = 0 + 7500
4x + x2 = 0 + 7500

Combine like terms: 0 + 7500 = 7500
4x + x2 = 7500

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 7500 + 4

Reorder the terms:
4 + 4x + x2 = 7500 + 4

Combine like terms: 7500 + 4 = 7504
4 + 4x + x2 = 7504

Factor a perfect square on the left side:
(x + 2)(x + 2) = 7504

Calculate the square root of the right side: 86.625631311

Break this problem into two subproblems by setting 
(x + 2) equal to 86.625631311 and -86.625631311.

Subproblem 1

x + 2 = 86.625631311 Simplifying x + 2 = 86.625631311 Reorder the terms: 2 + x = 86.625631311 Solving 2 + x = 86.625631311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 86.625631311 + -2 Combine like terms: 2 + -2 = 0 0 + x = 86.625631311 + -2 x = 86.625631311 + -2 Combine like terms: 86.625631311 + -2 = 84.625631311 x = 84.625631311 Simplifying x = 84.625631311

Subproblem 2

x + 2 = -86.625631311 Simplifying x + 2 = -86.625631311 Reorder the terms: 2 + x = -86.625631311 Solving 2 + x = -86.625631311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -86.625631311 + -2 Combine like terms: 2 + -2 = 0 0 + x = -86.625631311 + -2 x = -86.625631311 + -2 Combine like terms: -86.625631311 + -2 = -88.625631311 x = -88.625631311 Simplifying x = -88.625631311

Solution

The solution to the problem is based on the solutions from the subproblems. x = {84.625631311, -88.625631311}

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