7x^2-120x-3600=0

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Solution for 7x^2-120x-3600=0 equation:


Simplifying
7x2 + -120x + -3600 = 0

Reorder the terms:
-3600 + -120x + 7x2 = 0

Solving
-3600 + -120x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-514.2857143 + -17.14285714x + x2 = 0

Move the constant term to the right:

Add '514.2857143' to each side of the equation.
-514.2857143 + -17.14285714x + 514.2857143 + x2 = 0 + 514.2857143

Reorder the terms:
-514.2857143 + 514.2857143 + -17.14285714x + x2 = 0 + 514.2857143

Combine like terms: -514.2857143 + 514.2857143 = 0.0000000
0.0000000 + -17.14285714x + x2 = 0 + 514.2857143
-17.14285714x + x2 = 0 + 514.2857143

Combine like terms: 0 + 514.2857143 = 514.2857143
-17.14285714x + x2 = 514.2857143

The x term is -17.14285714x.  Take half its coefficient (-8.57142857).
Square it (73.46938773) and add it to both sides.

Add '73.46938773' to each side of the equation.
-17.14285714x + 73.46938773 + x2 = 514.2857143 + 73.46938773

Reorder the terms:
73.46938773 + -17.14285714x + x2 = 514.2857143 + 73.46938773

Combine like terms: 514.2857143 + 73.46938773 = 587.75510203
73.46938773 + -17.14285714x + x2 = 587.75510203

Factor a perfect square on the left side:
(x + -8.57142857)(x + -8.57142857) = 587.75510203

Calculate the square root of the right side: 24.243661069

Break this problem into two subproblems by setting 
(x + -8.57142857) equal to 24.243661069 and -24.243661069.

Subproblem 1

x + -8.57142857 = 24.243661069 Simplifying x + -8.57142857 = 24.243661069 Reorder the terms: -8.57142857 + x = 24.243661069 Solving -8.57142857 + x = 24.243661069 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.57142857' to each side of the equation. -8.57142857 + 8.57142857 + x = 24.243661069 + 8.57142857 Combine like terms: -8.57142857 + 8.57142857 = 0.00000000 0.00000000 + x = 24.243661069 + 8.57142857 x = 24.243661069 + 8.57142857 Combine like terms: 24.243661069 + 8.57142857 = 32.815089639 x = 32.815089639 Simplifying x = 32.815089639

Subproblem 2

x + -8.57142857 = -24.243661069 Simplifying x + -8.57142857 = -24.243661069 Reorder the terms: -8.57142857 + x = -24.243661069 Solving -8.57142857 + x = -24.243661069 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.57142857' to each side of the equation. -8.57142857 + 8.57142857 + x = -24.243661069 + 8.57142857 Combine like terms: -8.57142857 + 8.57142857 = 0.00000000 0.00000000 + x = -24.243661069 + 8.57142857 x = -24.243661069 + 8.57142857 Combine like terms: -24.243661069 + 8.57142857 = -15.672232499 x = -15.672232499 Simplifying x = -15.672232499

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.815089639, -15.672232499}

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