14x(6x-7)=79

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Solution for 14x(6x-7)=79 equation:


Simplifying
14x(6x + -7) = 79

Reorder the terms:
14x(-7 + 6x) = 79
(-7 * 14x + 6x * 14x) = 79
(-98x + 84x2) = 79

Solving
-98x + 84x2 = 79

Solving for variable 'x'.

Reorder the terms:
-79 + -98x + 84x2 = 79 + -79

Combine like terms: 79 + -79 = 0
-79 + -98x + 84x2 = 0

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

Divide each side by '84'.
-0.9404761905 + -1.166666667x + x2 = 0

Move the constant term to the right:

Add '0.9404761905' to each side of the equation.
-0.9404761905 + -1.166666667x + 0.9404761905 + x2 = 0 + 0.9404761905

Reorder the terms:
-0.9404761905 + 0.9404761905 + -1.166666667x + x2 = 0 + 0.9404761905

Combine like terms: -0.9404761905 + 0.9404761905 = 0.0000000000
0.0000000000 + -1.166666667x + x2 = 0 + 0.9404761905
-1.166666667x + x2 = 0 + 0.9404761905

Combine like terms: 0 + 0.9404761905 = 0.9404761905
-1.166666667x + x2 = 0.9404761905

The x term is -1.166666667x.  Take half its coefficient (-0.5833333335).
Square it (0.3402777780) and add it to both sides.

Add '0.3402777780' to each side of the equation.
-1.166666667x + 0.3402777780 + x2 = 0.9404761905 + 0.3402777780

Reorder the terms:
0.3402777780 + -1.166666667x + x2 = 0.9404761905 + 0.3402777780

Combine like terms: 0.9404761905 + 0.3402777780 = 1.2807539685
0.3402777780 + -1.166666667x + x2 = 1.2807539685

Factor a perfect square on the left side:
(x + -0.5833333335)(x + -0.5833333335) = 1.2807539685

Calculate the square root of the right side: 1.131704011

Break this problem into two subproblems by setting 
(x + -0.5833333335) equal to 1.131704011 and -1.131704011.

Subproblem 1

x + -0.5833333335 = 1.131704011 Simplifying x + -0.5833333335 = 1.131704011 Reorder the terms: -0.5833333335 + x = 1.131704011 Solving -0.5833333335 + x = 1.131704011 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = 1.131704011 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = 1.131704011 + 0.5833333335 x = 1.131704011 + 0.5833333335 Combine like terms: 1.131704011 + 0.5833333335 = 1.7150373445 x = 1.7150373445 Simplifying x = 1.7150373445

Subproblem 2

x + -0.5833333335 = -1.131704011 Simplifying x + -0.5833333335 = -1.131704011 Reorder the terms: -0.5833333335 + x = -1.131704011 Solving -0.5833333335 + x = -1.131704011 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5833333335' to each side of the equation. -0.5833333335 + 0.5833333335 + x = -1.131704011 + 0.5833333335 Combine like terms: -0.5833333335 + 0.5833333335 = 0.0000000000 0.0000000000 + x = -1.131704011 + 0.5833333335 x = -1.131704011 + 0.5833333335 Combine like terms: -1.131704011 + 0.5833333335 = -0.5483706775 x = -0.5483706775 Simplifying x = -0.5483706775

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.7150373445, -0.5483706775}

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