(7x-5)(7x-5)=26

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Solution for (7x-5)(7x-5)=26 equation:


Simplifying
(7x + -5)(7x + -5) = 26

Reorder the terms:
(-5 + 7x)(7x + -5) = 26

Reorder the terms:
(-5 + 7x)(-5 + 7x) = 26

Multiply (-5 + 7x) * (-5 + 7x)
(-5(-5 + 7x) + 7x * (-5 + 7x)) = 26
((-5 * -5 + 7x * -5) + 7x * (-5 + 7x)) = 26
((25 + -35x) + 7x * (-5 + 7x)) = 26
(25 + -35x + (-5 * 7x + 7x * 7x)) = 26
(25 + -35x + (-35x + 49x2)) = 26

Combine like terms: -35x + -35x = -70x
(25 + -70x + 49x2) = 26

Solving
25 + -70x + 49x2 = 26

Solving for variable 'x'.

Reorder the terms:
25 + -26 + -70x + 49x2 = 26 + -26

Combine like terms: 25 + -26 = -1
-1 + -70x + 49x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-1 + -70x + 49x2 = 0

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

Divide each side by '49'.
-0.02040816327 + -1.428571429x + x2 = 0

Move the constant term to the right:

Add '0.02040816327' to each side of the equation.
-0.02040816327 + -1.428571429x + 0.02040816327 + x2 = 0 + 0.02040816327

Reorder the terms:
-0.02040816327 + 0.02040816327 + -1.428571429x + x2 = 0 + 0.02040816327

Combine like terms: -0.02040816327 + 0.02040816327 = 0.00000000000
0.00000000000 + -1.428571429x + x2 = 0 + 0.02040816327
-1.428571429x + x2 = 0 + 0.02040816327

Combine like terms: 0 + 0.02040816327 = 0.02040816327
-1.428571429x + x2 = 0.02040816327

The x term is -1.428571429x.  Take half its coefficient (-0.7142857145).
Square it (0.5102040819) and add it to both sides.

Add '0.5102040819' to each side of the equation.
-1.428571429x + 0.5102040819 + x2 = 0.02040816327 + 0.5102040819

Reorder the terms:
0.5102040819 + -1.428571429x + x2 = 0.02040816327 + 0.5102040819

Combine like terms: 0.02040816327 + 0.5102040819 = 0.53061224517
0.5102040819 + -1.428571429x + x2 = 0.53061224517

Factor a perfect square on the left side:
(x + -0.7142857145)(x + -0.7142857145) = 0.53061224517

Calculate the square root of the right side: 0.728431359

Break this problem into two subproblems by setting 
(x + -0.7142857145) equal to 0.728431359 and -0.728431359.

Subproblem 1

x + -0.7142857145 = 0.728431359 Simplifying x + -0.7142857145 = 0.728431359 Reorder the terms: -0.7142857145 + x = 0.728431359 Solving -0.7142857145 + x = 0.728431359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + x = 0.728431359 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + x = 0.728431359 + 0.7142857145 x = 0.728431359 + 0.7142857145 Combine like terms: 0.728431359 + 0.7142857145 = 1.4427170735 x = 1.4427170735 Simplifying x = 1.4427170735

Subproblem 2

x + -0.7142857145 = -0.728431359 Simplifying x + -0.7142857145 = -0.728431359 Reorder the terms: -0.7142857145 + x = -0.728431359 Solving -0.7142857145 + x = -0.728431359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.7142857145' to each side of the equation. -0.7142857145 + 0.7142857145 + x = -0.728431359 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + x = -0.728431359 + 0.7142857145 x = -0.728431359 + 0.7142857145 Combine like terms: -0.728431359 + 0.7142857145 = -0.0141456445 x = -0.0141456445 Simplifying x = -0.0141456445

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.4427170735, -0.0141456445}

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