x^2+156x+1600=0

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Solution for x^2+156x+1600=0 equation:


Simplifying
x2 + 156x + 1600 = 0

Reorder the terms:
1600 + 156x + x2 = 0

Solving
1600 + 156x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-1600' to each side of the equation.
1600 + 156x + -1600 + x2 = 0 + -1600

Reorder the terms:
1600 + -1600 + 156x + x2 = 0 + -1600

Combine like terms: 1600 + -1600 = 0
0 + 156x + x2 = 0 + -1600
156x + x2 = 0 + -1600

Combine like terms: 0 + -1600 = -1600
156x + x2 = -1600

The x term is 156x.  Take half its coefficient (78).
Square it (6084) and add it to both sides.

Add '6084' to each side of the equation.
156x + 6084 + x2 = -1600 + 6084

Reorder the terms:
6084 + 156x + x2 = -1600 + 6084

Combine like terms: -1600 + 6084 = 4484
6084 + 156x + x2 = 4484

Factor a perfect square on the left side:
(x + 78)(x + 78) = 4484

Calculate the square root of the right side: 66.962676171

Break this problem into two subproblems by setting 
(x + 78) equal to 66.962676171 and -66.962676171.

Subproblem 1

x + 78 = 66.962676171 Simplifying x + 78 = 66.962676171 Reorder the terms: 78 + x = 66.962676171 Solving 78 + x = 66.962676171 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-78' to each side of the equation. 78 + -78 + x = 66.962676171 + -78 Combine like terms: 78 + -78 = 0 0 + x = 66.962676171 + -78 x = 66.962676171 + -78 Combine like terms: 66.962676171 + -78 = -11.037323829 x = -11.037323829 Simplifying x = -11.037323829

Subproblem 2

x + 78 = -66.962676171 Simplifying x + 78 = -66.962676171 Reorder the terms: 78 + x = -66.962676171 Solving 78 + x = -66.962676171 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-78' to each side of the equation. 78 + -78 + x = -66.962676171 + -78 Combine like terms: 78 + -78 = 0 0 + x = -66.962676171 + -78 x = -66.962676171 + -78 Combine like terms: -66.962676171 + -78 = -144.962676171 x = -144.962676171 Simplifying x = -144.962676171

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-11.037323829, -144.962676171}

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