x^2+100x+100=408

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Solution for x^2+100x+100=408 equation:


Simplifying
x2 + 100x + 100 = 408

Reorder the terms:
100 + 100x + x2 = 408

Solving
100 + 100x + x2 = 408

Solving for variable 'x'.

Reorder the terms:
100 + -408 + 100x + x2 = 408 + -408

Combine like terms: 100 + -408 = -308
-308 + 100x + x2 = 408 + -408

Combine like terms: 408 + -408 = 0
-308 + 100x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '308' to each side of the equation.
-308 + 100x + 308 + x2 = 0 + 308

Reorder the terms:
-308 + 308 + 100x + x2 = 0 + 308

Combine like terms: -308 + 308 = 0
0 + 100x + x2 = 0 + 308
100x + x2 = 0 + 308

Combine like terms: 0 + 308 = 308
100x + x2 = 308

The x term is 100x.  Take half its coefficient (50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
100x + 2500 + x2 = 308 + 2500

Reorder the terms:
2500 + 100x + x2 = 308 + 2500

Combine like terms: 308 + 2500 = 2808
2500 + 100x + x2 = 2808

Factor a perfect square on the left side:
(x + 50)(x + 50) = 2808

Calculate the square root of the right side: 52.990565198

Break this problem into two subproblems by setting 
(x + 50) equal to 52.990565198 and -52.990565198.

Subproblem 1

x + 50 = 52.990565198 Simplifying x + 50 = 52.990565198 Reorder the terms: 50 + x = 52.990565198 Solving 50 + x = 52.990565198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x = 52.990565198 + -50 Combine like terms: 50 + -50 = 0 0 + x = 52.990565198 + -50 x = 52.990565198 + -50 Combine like terms: 52.990565198 + -50 = 2.990565198 x = 2.990565198 Simplifying x = 2.990565198

Subproblem 2

x + 50 = -52.990565198 Simplifying x + 50 = -52.990565198 Reorder the terms: 50 + x = -52.990565198 Solving 50 + x = -52.990565198 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + x = -52.990565198 + -50 Combine like terms: 50 + -50 = 0 0 + x = -52.990565198 + -50 x = -52.990565198 + -50 Combine like terms: -52.990565198 + -50 = -102.990565198 x = -102.990565198 Simplifying x = -102.990565198

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.990565198, -102.990565198}

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