7x^2-7x-114=0

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Solution for 7x^2-7x-114=0 equation:


Simplifying
7x2 + -7x + -114 = 0

Reorder the terms:
-114 + -7x + 7x2 = 0

Solving
-114 + -7x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-16.28571429 + -1x + x2 = 0

Move the constant term to the right:

Add '16.28571429' to each side of the equation.
-16.28571429 + -1x + 16.28571429 + x2 = 0 + 16.28571429

Reorder the terms:
-16.28571429 + 16.28571429 + -1x + x2 = 0 + 16.28571429

Combine like terms: -16.28571429 + 16.28571429 = 0.00000000
0.00000000 + -1x + x2 = 0 + 16.28571429
-1x + x2 = 0 + 16.28571429

Combine like terms: 0 + 16.28571429 = 16.28571429
-1x + x2 = 16.28571429

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 16.28571429 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 16.28571429 + 0.25

Combine like terms: 16.28571429 + 0.25 = 16.53571429
0.25 + -1x + x2 = 16.53571429

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 16.53571429

Calculate the square root of the right side: 4.066412951

Break this problem into two subproblems by setting 
(x + -0.5) equal to 4.066412951 and -4.066412951.

Subproblem 1

x + -0.5 = 4.066412951 Simplifying x + -0.5 = 4.066412951 Reorder the terms: -0.5 + x = 4.066412951 Solving -0.5 + x = 4.066412951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 4.066412951 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 4.066412951 + 0.5 x = 4.066412951 + 0.5 Combine like terms: 4.066412951 + 0.5 = 4.566412951 x = 4.566412951 Simplifying x = 4.566412951

Subproblem 2

x + -0.5 = -4.066412951 Simplifying x + -0.5 = -4.066412951 Reorder the terms: -0.5 + x = -4.066412951 Solving -0.5 + x = -4.066412951 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -4.066412951 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -4.066412951 + 0.5 x = -4.066412951 + 0.5 Combine like terms: -4.066412951 + 0.5 = -3.566412951 x = -3.566412951 Simplifying x = -3.566412951

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.566412951, -3.566412951}

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