28x^2-15x-32=0

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Solution for 28x^2-15x-32=0 equation:


Simplifying
28x2 + -15x + -32 = 0

Reorder the terms:
-32 + -15x + 28x2 = 0

Solving
-32 + -15x + 28x2 = 0

Solving for variable 'x'.

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

Divide each side by '28'.
-1.142857143 + -0.5357142857x + x2 = 0

Move the constant term to the right:

Add '1.142857143' to each side of the equation.
-1.142857143 + -0.5357142857x + 1.142857143 + x2 = 0 + 1.142857143

Reorder the terms:
-1.142857143 + 1.142857143 + -0.5357142857x + x2 = 0 + 1.142857143

Combine like terms: -1.142857143 + 1.142857143 = 0.000000000
0.000000000 + -0.5357142857x + x2 = 0 + 1.142857143
-0.5357142857x + x2 = 0 + 1.142857143

Combine like terms: 0 + 1.142857143 = 1.142857143
-0.5357142857x + x2 = 1.142857143

The x term is -0.5357142857x.  Take half its coefficient (-0.2678571429).
Square it (0.07174744900) and add it to both sides.

Add '0.07174744900' to each side of the equation.
-0.5357142857x + 0.07174744900 + x2 = 1.142857143 + 0.07174744900

Reorder the terms:
0.07174744900 + -0.5357142857x + x2 = 1.142857143 + 0.07174744900

Combine like terms: 1.142857143 + 0.07174744900 = 1.214604592
0.07174744900 + -0.5357142857x + x2 = 1.214604592

Factor a perfect square on the left side:
(x + -0.2678571429)(x + -0.2678571429) = 1.214604592

Calculate the square root of the right side: 1.102091009

Break this problem into two subproblems by setting 
(x + -0.2678571429) equal to 1.102091009 and -1.102091009.

Subproblem 1

x + -0.2678571429 = 1.102091009 Simplifying x + -0.2678571429 = 1.102091009 Reorder the terms: -0.2678571429 + x = 1.102091009 Solving -0.2678571429 + x = 1.102091009 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2678571429' to each side of the equation. -0.2678571429 + 0.2678571429 + x = 1.102091009 + 0.2678571429 Combine like terms: -0.2678571429 + 0.2678571429 = 0.0000000000 0.0000000000 + x = 1.102091009 + 0.2678571429 x = 1.102091009 + 0.2678571429 Combine like terms: 1.102091009 + 0.2678571429 = 1.3699481519 x = 1.3699481519 Simplifying x = 1.3699481519

Subproblem 2

x + -0.2678571429 = -1.102091009 Simplifying x + -0.2678571429 = -1.102091009 Reorder the terms: -0.2678571429 + x = -1.102091009 Solving -0.2678571429 + x = -1.102091009 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2678571429' to each side of the equation. -0.2678571429 + 0.2678571429 + x = -1.102091009 + 0.2678571429 Combine like terms: -0.2678571429 + 0.2678571429 = 0.0000000000 0.0000000000 + x = -1.102091009 + 0.2678571429 x = -1.102091009 + 0.2678571429 Combine like terms: -1.102091009 + 0.2678571429 = -0.8342338661 x = -0.8342338661 Simplifying x = -0.8342338661

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.3699481519, -0.8342338661}

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