13x^2-104x+178=26

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Solution for 13x^2-104x+178=26 equation:


Simplifying
13x2 + -104x + 178 = 26

Reorder the terms:
178 + -104x + 13x2 = 26

Solving
178 + -104x + 13x2 = 26

Solving for variable 'x'.

Reorder the terms:
178 + -26 + -104x + 13x2 = 26 + -26

Combine like terms: 178 + -26 = 152
152 + -104x + 13x2 = 26 + -26

Combine like terms: 26 + -26 = 0
152 + -104x + 13x2 = 0

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

Divide each side by '13'.
11.69230769 + -8x + x2 = 0

Move the constant term to the right:

Add '-11.69230769' to each side of the equation.
11.69230769 + -8x + -11.69230769 + x2 = 0 + -11.69230769

Reorder the terms:
11.69230769 + -11.69230769 + -8x + x2 = 0 + -11.69230769

Combine like terms: 11.69230769 + -11.69230769 = 0.00000000
0.00000000 + -8x + x2 = 0 + -11.69230769
-8x + x2 = 0 + -11.69230769

Combine like terms: 0 + -11.69230769 = -11.69230769
-8x + x2 = -11.69230769

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -11.69230769 + 16

Reorder the terms:
16 + -8x + x2 = -11.69230769 + 16

Combine like terms: -11.69230769 + 16 = 4.30769231
16 + -8x + x2 = 4.30769231

Factor a perfect square on the left side:
(x + -4)(x + -4) = 4.30769231

Calculate the square root of the right side: 2.075498087

Break this problem into two subproblems by setting 
(x + -4) equal to 2.075498087 and -2.075498087.

Subproblem 1

x + -4 = 2.075498087 Simplifying x + -4 = 2.075498087 Reorder the terms: -4 + x = 2.075498087 Solving -4 + x = 2.075498087 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 2.075498087 + 4 Combine like terms: -4 + 4 = 0 0 + x = 2.075498087 + 4 x = 2.075498087 + 4 Combine like terms: 2.075498087 + 4 = 6.075498087 x = 6.075498087 Simplifying x = 6.075498087

Subproblem 2

x + -4 = -2.075498087 Simplifying x + -4 = -2.075498087 Reorder the terms: -4 + x = -2.075498087 Solving -4 + x = -2.075498087 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -2.075498087 + 4 Combine like terms: -4 + 4 = 0 0 + x = -2.075498087 + 4 x = -2.075498087 + 4 Combine like terms: -2.075498087 + 4 = 1.924501913 x = 1.924501913 Simplifying x = 1.924501913

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.075498087, 1.924501913}

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