(7x-5)(7x-5)=14

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Solution for (7x-5)(7x-5)=14 equation:


Simplifying
(7x + -5)(7x + -5) = 14

Reorder the terms:
(-5 + 7x)(7x + -5) = 14

Reorder the terms:
(-5 + 7x)(-5 + 7x) = 14

Multiply (-5 + 7x) * (-5 + 7x)
(-5(-5 + 7x) + 7x * (-5 + 7x)) = 14
((-5 * -5 + 7x * -5) + 7x * (-5 + 7x)) = 14
((25 + -35x) + 7x * (-5 + 7x)) = 14
(25 + -35x + (-5 * 7x + 7x * 7x)) = 14
(25 + -35x + (-35x + 49x2)) = 14

Combine like terms: -35x + -35x = -70x
(25 + -70x + 49x2) = 14

Solving
25 + -70x + 49x2 = 14

Solving for variable 'x'.

Reorder the terms:
25 + -14 + -70x + 49x2 = 14 + -14

Combine like terms: 25 + -14 = 11
11 + -70x + 49x2 = 14 + -14

Combine like terms: 14 + -14 = 0
11 + -70x + 49x2 = 0

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

Divide each side by '49'.
0.2244897959 + -1.428571429x + x2 = 0

Move the constant term to the right:

Add '-0.2244897959' to each side of the equation.
0.2244897959 + -1.428571429x + -0.2244897959 + x2 = 0 + -0.2244897959

Reorder the terms:
0.2244897959 + -0.2244897959 + -1.428571429x + x2 = 0 + -0.2244897959

Combine like terms: 0.2244897959 + -0.2244897959 = 0.0000000000
0.0000000000 + -1.428571429x + x2 = 0 + -0.2244897959
-1.428571429x + x2 = 0 + -0.2244897959

Combine like terms: 0 + -0.2244897959 = -0.2244897959
-1.428571429x + x2 = -0.2244897959

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 = -0.2244897959 + 0.5102040819

Reorder the terms:
0.5102040819 + -1.428571429x + x2 = -0.2244897959 + 0.5102040819

Combine like terms: -0.2244897959 + 0.5102040819 = 0.285714286
0.5102040819 + -1.428571429x + x2 = 0.285714286

Factor a perfect square on the left side:
(x + -0.7142857145)(x + -0.7142857145) = 0.285714286

Calculate the square root of the right side: 0.534522484

Break this problem into two subproblems by setting 
(x + -0.7142857145) equal to 0.534522484 and -0.534522484.

Subproblem 1

x + -0.7142857145 = 0.534522484 Simplifying x + -0.7142857145 = 0.534522484 Reorder the terms: -0.7142857145 + x = 0.534522484 Solving -0.7142857145 + x = 0.534522484 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 = 0.534522484 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + x = 0.534522484 + 0.7142857145 x = 0.534522484 + 0.7142857145 Combine like terms: 0.534522484 + 0.7142857145 = 1.2488081985 x = 1.2488081985 Simplifying x = 1.2488081985

Subproblem 2

x + -0.7142857145 = -0.534522484 Simplifying x + -0.7142857145 = -0.534522484 Reorder the terms: -0.7142857145 + x = -0.534522484 Solving -0.7142857145 + x = -0.534522484 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 = -0.534522484 + 0.7142857145 Combine like terms: -0.7142857145 + 0.7142857145 = 0.0000000000 0.0000000000 + x = -0.534522484 + 0.7142857145 x = -0.534522484 + 0.7142857145 Combine like terms: -0.534522484 + 0.7142857145 = 0.1797632305 x = 0.1797632305 Simplifying x = 0.1797632305

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2488081985, 0.1797632305}

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