7x^2-48x-46=0

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Solution for 7x^2-48x-46=0 equation:


Simplifying
7x2 + -48x + -46 = 0

Reorder the terms:
-46 + -48x + 7x2 = 0

Solving
-46 + -48x + 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'.
-6.571428571 + -6.857142857x + x2 = 0

Move the constant term to the right:

Add '6.571428571' to each side of the equation.
-6.571428571 + -6.857142857x + 6.571428571 + x2 = 0 + 6.571428571

Reorder the terms:
-6.571428571 + 6.571428571 + -6.857142857x + x2 = 0 + 6.571428571

Combine like terms: -6.571428571 + 6.571428571 = 0.000000000
0.000000000 + -6.857142857x + x2 = 0 + 6.571428571
-6.857142857x + x2 = 0 + 6.571428571

Combine like terms: 0 + 6.571428571 = 6.571428571
-6.857142857x + x2 = 6.571428571

The x term is -6.857142857x.  Take half its coefficient (-3.428571429).
Square it (11.75510204) and add it to both sides.

Add '11.75510204' to each side of the equation.
-6.857142857x + 11.75510204 + x2 = 6.571428571 + 11.75510204

Reorder the terms:
11.75510204 + -6.857142857x + x2 = 6.571428571 + 11.75510204

Combine like terms: 6.571428571 + 11.75510204 = 18.326530611
11.75510204 + -6.857142857x + x2 = 18.326530611

Factor a perfect square on the left side:
(x + -3.428571429)(x + -3.428571429) = 18.326530611

Calculate the square root of the right side: 4.280949732

Break this problem into two subproblems by setting 
(x + -3.428571429) equal to 4.280949732 and -4.280949732.

Subproblem 1

x + -3.428571429 = 4.280949732 Simplifying x + -3.428571429 = 4.280949732 Reorder the terms: -3.428571429 + x = 4.280949732 Solving -3.428571429 + x = 4.280949732 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + x = 4.280949732 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + x = 4.280949732 + 3.428571429 x = 4.280949732 + 3.428571429 Combine like terms: 4.280949732 + 3.428571429 = 7.709521161 x = 7.709521161 Simplifying x = 7.709521161

Subproblem 2

x + -3.428571429 = -4.280949732 Simplifying x + -3.428571429 = -4.280949732 Reorder the terms: -3.428571429 + x = -4.280949732 Solving -3.428571429 + x = -4.280949732 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.428571429' to each side of the equation. -3.428571429 + 3.428571429 + x = -4.280949732 + 3.428571429 Combine like terms: -3.428571429 + 3.428571429 = 0.000000000 0.000000000 + x = -4.280949732 + 3.428571429 x = -4.280949732 + 3.428571429 Combine like terms: -4.280949732 + 3.428571429 = -0.852378303 x = -0.852378303 Simplifying x = -0.852378303

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.709521161, -0.852378303}

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