x^2-105x+156=0

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Solution for x^2-105x+156=0 equation:


Simplifying
x2 + -105x + 156 = 0

Reorder the terms:
156 + -105x + x2 = 0

Solving
156 + -105x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-156' to each side of the equation.
156 + -105x + -156 + x2 = 0 + -156

Reorder the terms:
156 + -156 + -105x + x2 = 0 + -156

Combine like terms: 156 + -156 = 0
0 + -105x + x2 = 0 + -156
-105x + x2 = 0 + -156

Combine like terms: 0 + -156 = -156
-105x + x2 = -156

The x term is -105x.  Take half its coefficient (-52.5).
Square it (2756.25) and add it to both sides.

Add '2756.25' to each side of the equation.
-105x + 2756.25 + x2 = -156 + 2756.25

Reorder the terms:
2756.25 + -105x + x2 = -156 + 2756.25

Combine like terms: -156 + 2756.25 = 2600.25
2756.25 + -105x + x2 = 2600.25

Factor a perfect square on the left side:
(x + -52.5)(x + -52.5) = 2600.25

Calculate the square root of the right side: 50.992646529

Break this problem into two subproblems by setting 
(x + -52.5) equal to 50.992646529 and -50.992646529.

Subproblem 1

x + -52.5 = 50.992646529 Simplifying x + -52.5 = 50.992646529 Reorder the terms: -52.5 + x = 50.992646529 Solving -52.5 + x = 50.992646529 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '52.5' to each side of the equation. -52.5 + 52.5 + x = 50.992646529 + 52.5 Combine like terms: -52.5 + 52.5 = 0.0 0.0 + x = 50.992646529 + 52.5 x = 50.992646529 + 52.5 Combine like terms: 50.992646529 + 52.5 = 103.492646529 x = 103.492646529 Simplifying x = 103.492646529

Subproblem 2

x + -52.5 = -50.992646529 Simplifying x + -52.5 = -50.992646529 Reorder the terms: -52.5 + x = -50.992646529 Solving -52.5 + x = -50.992646529 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '52.5' to each side of the equation. -52.5 + 52.5 + x = -50.992646529 + 52.5 Combine like terms: -52.5 + 52.5 = 0.0 0.0 + x = -50.992646529 + 52.5 x = -50.992646529 + 52.5 Combine like terms: -50.992646529 + 52.5 = 1.507353471 x = 1.507353471 Simplifying x = 1.507353471

Solution

The solution to the problem is based on the solutions from the subproblems. x = {103.492646529, 1.507353471}

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