7x^2+2x=3600

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Solution for 7x^2+2x=3600 equation:


Simplifying
7x2 + 2x = 3600

Reorder the terms:
2x + 7x2 = 3600

Solving
2x + 7x2 = 3600

Solving for variable 'x'.

Reorder the terms:
-3600 + 2x + 7x2 = 3600 + -3600

Combine like terms: 3600 + -3600 = 0
-3600 + 2x + 7x2 = 0

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

Divide each side by '7'.
-514.2857143 + 0.2857142857x + x2 = 0

Move the constant term to the right:

Add '514.2857143' to each side of the equation.
-514.2857143 + 0.2857142857x + 514.2857143 + x2 = 0 + 514.2857143

Reorder the terms:
-514.2857143 + 514.2857143 + 0.2857142857x + x2 = 0 + 514.2857143

Combine like terms: -514.2857143 + 514.2857143 = 0.0000000
0.0000000 + 0.2857142857x + x2 = 0 + 514.2857143
0.2857142857x + x2 = 0 + 514.2857143

Combine like terms: 0 + 514.2857143 = 514.2857143
0.2857142857x + x2 = 514.2857143

The x term is 0.2857142857x.  Take half its coefficient (0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
0.2857142857x + 0.02040816328 + x2 = 514.2857143 + 0.02040816328

Reorder the terms:
0.02040816328 + 0.2857142857x + x2 = 514.2857143 + 0.02040816328

Combine like terms: 514.2857143 + 0.02040816328 = 514.30612246328
0.02040816328 + 0.2857142857x + x2 = 514.30612246328

Factor a perfect square on the left side:
(x + 0.1428571429)(x + 0.1428571429) = 514.30612246328

Calculate the square root of the right side: 22.678318334

Break this problem into two subproblems by setting 
(x + 0.1428571429) equal to 22.678318334 and -22.678318334.

Subproblem 1

x + 0.1428571429 = 22.678318334 Simplifying x + 0.1428571429 = 22.678318334 Reorder the terms: 0.1428571429 + x = 22.678318334 Solving 0.1428571429 + x = 22.678318334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = 22.678318334 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = 22.678318334 + -0.1428571429 x = 22.678318334 + -0.1428571429 Combine like terms: 22.678318334 + -0.1428571429 = 22.5354611911 x = 22.5354611911 Simplifying x = 22.5354611911

Subproblem 2

x + 0.1428571429 = -22.678318334 Simplifying x + 0.1428571429 = -22.678318334 Reorder the terms: 0.1428571429 + x = -22.678318334 Solving 0.1428571429 + x = -22.678318334 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1428571429' to each side of the equation. 0.1428571429 + -0.1428571429 + x = -22.678318334 + -0.1428571429 Combine like terms: 0.1428571429 + -0.1428571429 = 0.0000000000 0.0000000000 + x = -22.678318334 + -0.1428571429 x = -22.678318334 + -0.1428571429 Combine like terms: -22.678318334 + -0.1428571429 = -22.8211754769 x = -22.8211754769 Simplifying x = -22.8211754769

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.5354611911, -22.8211754769}

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