0=x^2+26x-600

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Solution for 0=x^2+26x-600 equation:


Simplifying
0 = x2 + 26x + -600

Reorder the terms:
0 = -600 + 26x + x2

Solving
0 = -600 + 26x + x2

Solving for variable 'x'.

Combine like terms: 0 + 600 = 600
600 + -26x + -1x2 = -600 + 26x + x2 + 600 + -26x + -1x2

Reorder the terms:
600 + -26x + -1x2 = -600 + 600 + 26x + -26x + x2 + -1x2

Combine like terms: -600 + 600 = 0
600 + -26x + -1x2 = 0 + 26x + -26x + x2 + -1x2
600 + -26x + -1x2 = 26x + -26x + x2 + -1x2

Combine like terms: 26x + -26x = 0
600 + -26x + -1x2 = 0 + x2 + -1x2
600 + -26x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
600 + -26x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-600 + 26x + x2 = 0

Move the constant term to the right:

Add '600' to each side of the equation.
-600 + 26x + 600 + x2 = 0 + 600

Reorder the terms:
-600 + 600 + 26x + x2 = 0 + 600

Combine like terms: -600 + 600 = 0
0 + 26x + x2 = 0 + 600
26x + x2 = 0 + 600

Combine like terms: 0 + 600 = 600
26x + x2 = 600

The x term is 26x.  Take half its coefficient (13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
26x + 169 + x2 = 600 + 169

Reorder the terms:
169 + 26x + x2 = 600 + 169

Combine like terms: 600 + 169 = 769
169 + 26x + x2 = 769

Factor a perfect square on the left side:
(x + 13)(x + 13) = 769

Calculate the square root of the right side: 27.730849248

Break this problem into two subproblems by setting 
(x + 13) equal to 27.730849248 and -27.730849248.

Subproblem 1

x + 13 = 27.730849248 Simplifying x + 13 = 27.730849248 Reorder the terms: 13 + x = 27.730849248 Solving 13 + x = 27.730849248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = 27.730849248 + -13 Combine like terms: 13 + -13 = 0 0 + x = 27.730849248 + -13 x = 27.730849248 + -13 Combine like terms: 27.730849248 + -13 = 14.730849248 x = 14.730849248 Simplifying x = 14.730849248

Subproblem 2

x + 13 = -27.730849248 Simplifying x + 13 = -27.730849248 Reorder the terms: 13 + x = -27.730849248 Solving 13 + x = -27.730849248 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = -27.730849248 + -13 Combine like terms: 13 + -13 = 0 0 + x = -27.730849248 + -13 x = -27.730849248 + -13 Combine like terms: -27.730849248 + -13 = -40.730849248 x = -40.730849248 Simplifying x = -40.730849248

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.730849248, -40.730849248}

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