49x^2-14x-64=0

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Solution for 49x^2-14x-64=0 equation:


Simplifying
49x2 + -14x + -64 = 0

Reorder the terms:
-64 + -14x + 49x2 = 0

Solving
-64 + -14x + 49x2 = 0

Solving for variable 'x'.

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

Divide each side by '49'.
-1.306122449 + -0.2857142857x + x2 = 0

Move the constant term to the right:

Add '1.306122449' to each side of the equation.
-1.306122449 + -0.2857142857x + 1.306122449 + x2 = 0 + 1.306122449

Reorder the terms:
-1.306122449 + 1.306122449 + -0.2857142857x + x2 = 0 + 1.306122449

Combine like terms: -1.306122449 + 1.306122449 = 0.000000000
0.000000000 + -0.2857142857x + x2 = 0 + 1.306122449
-0.2857142857x + x2 = 0 + 1.306122449

Combine like terms: 0 + 1.306122449 = 1.306122449
-0.2857142857x + x2 = 1.306122449

The x term is -0.2857142857x.  Take half its coefficient (-0.1428571429).
Square it (0.02040816328) and add it to both sides.

Add '0.02040816328' to each side of the equation.
-0.2857142857x + 0.02040816328 + x2 = 1.306122449 + 0.02040816328

Reorder the terms:
0.02040816328 + -0.2857142857x + x2 = 1.306122449 + 0.02040816328

Combine like terms: 1.306122449 + 0.02040816328 = 1.32653061228
0.02040816328 + -0.2857142857x + x2 = 1.32653061228

Factor a perfect square on the left side:
(x + -0.1428571429)(x + -0.1428571429) = 1.32653061228

Calculate the square root of the right side: 1.151751107

Break this problem into two subproblems by setting 
(x + -0.1428571429) equal to 1.151751107 and -1.151751107.

Subproblem 1

x + -0.1428571429 = 1.151751107 Simplifying x + -0.1428571429 = 1.151751107 Reorder the terms: -0.1428571429 + x = 1.151751107 Solving -0.1428571429 + x = 1.151751107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + x = 1.151751107 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + x = 1.151751107 + 0.1428571429 x = 1.151751107 + 0.1428571429 Combine like terms: 1.151751107 + 0.1428571429 = 1.2946082499 x = 1.2946082499 Simplifying x = 1.2946082499

Subproblem 2

x + -0.1428571429 = -1.151751107 Simplifying x + -0.1428571429 = -1.151751107 Reorder the terms: -0.1428571429 + x = -1.151751107 Solving -0.1428571429 + x = -1.151751107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1428571429' to each side of the equation. -0.1428571429 + 0.1428571429 + x = -1.151751107 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + x = -1.151751107 + 0.1428571429 x = -1.151751107 + 0.1428571429 Combine like terms: -1.151751107 + 0.1428571429 = -1.0088939641 x = -1.0088939641 Simplifying x = -1.0088939641

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2946082499, -1.0088939641}

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