4.9x^2-68x-4.1=0

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Solution for 4.9x^2-68x-4.1=0 equation:


Simplifying
4.9x2 + -68x + -4.1 = 0

Reorder the terms:
-4.1 + -68x + 4.9x2 = 0

Solving
-4.1 + -68x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-0.8367346939 + -13.87755102x + x2 = 0

Move the constant term to the right:

Add '0.8367346939' to each side of the equation.
-0.8367346939 + -13.87755102x + 0.8367346939 + x2 = 0 + 0.8367346939

Reorder the terms:
-0.8367346939 + 0.8367346939 + -13.87755102x + x2 = 0 + 0.8367346939

Combine like terms: -0.8367346939 + 0.8367346939 = 0.0000000000
0.0000000000 + -13.87755102x + x2 = 0 + 0.8367346939
-13.87755102x + x2 = 0 + 0.8367346939

Combine like terms: 0 + 0.8367346939 = 0.8367346939
-13.87755102x + x2 = 0.8367346939

The x term is -13.87755102x.  Take half its coefficient (-6.93877551).
Square it (48.14660558) and add it to both sides.

Add '48.14660558' to each side of the equation.
-13.87755102x + 48.14660558 + x2 = 0.8367346939 + 48.14660558

Reorder the terms:
48.14660558 + -13.87755102x + x2 = 0.8367346939 + 48.14660558

Combine like terms: 0.8367346939 + 48.14660558 = 48.9833402739
48.14660558 + -13.87755102x + x2 = 48.9833402739

Factor a perfect square on the left side:
(x + -6.93877551)(x + -6.93877551) = 48.9833402739

Calculate the square root of the right side: 6.998809918

Break this problem into two subproblems by setting 
(x + -6.93877551) equal to 6.998809918 and -6.998809918.

Subproblem 1

x + -6.93877551 = 6.998809918 Simplifying x + -6.93877551 = 6.998809918 Reorder the terms: -6.93877551 + x = 6.998809918 Solving -6.93877551 + x = 6.998809918 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.93877551' to each side of the equation. -6.93877551 + 6.93877551 + x = 6.998809918 + 6.93877551 Combine like terms: -6.93877551 + 6.93877551 = 0.00000000 0.00000000 + x = 6.998809918 + 6.93877551 x = 6.998809918 + 6.93877551 Combine like terms: 6.998809918 + 6.93877551 = 13.937585428 x = 13.937585428 Simplifying x = 13.937585428

Subproblem 2

x + -6.93877551 = -6.998809918 Simplifying x + -6.93877551 = -6.998809918 Reorder the terms: -6.93877551 + x = -6.998809918 Solving -6.93877551 + x = -6.998809918 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.93877551' to each side of the equation. -6.93877551 + 6.93877551 + x = -6.998809918 + 6.93877551 Combine like terms: -6.93877551 + 6.93877551 = 0.00000000 0.00000000 + x = -6.998809918 + 6.93877551 x = -6.998809918 + 6.93877551 Combine like terms: -6.998809918 + 6.93877551 = -0.060034408 x = -0.060034408 Simplifying x = -0.060034408

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.937585428, -0.060034408}

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