35x^2-69x-12=0

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Solution for 35x^2-69x-12=0 equation:


Simplifying
35x2 + -69x + -12 = 0

Reorder the terms:
-12 + -69x + 35x2 = 0

Solving
-12 + -69x + 35x2 = 0

Solving for variable 'x'.

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

Divide each side by '35'.
-0.3428571429 + -1.971428571x + x2 = 0

Move the constant term to the right:

Add '0.3428571429' to each side of the equation.
-0.3428571429 + -1.971428571x + 0.3428571429 + x2 = 0 + 0.3428571429

Reorder the terms:
-0.3428571429 + 0.3428571429 + -1.971428571x + x2 = 0 + 0.3428571429

Combine like terms: -0.3428571429 + 0.3428571429 = 0.0000000000
0.0000000000 + -1.971428571x + x2 = 0 + 0.3428571429
-1.971428571x + x2 = 0 + 0.3428571429

Combine like terms: 0 + 0.3428571429 = 0.3428571429
-1.971428571x + x2 = 0.3428571429

The x term is -1.971428571x.  Take half its coefficient (-0.9857142855).
Square it (0.9716326526) and add it to both sides.

Add '0.9716326526' to each side of the equation.
-1.971428571x + 0.9716326526 + x2 = 0.3428571429 + 0.9716326526

Reorder the terms:
0.9716326526 + -1.971428571x + x2 = 0.3428571429 + 0.9716326526

Combine like terms: 0.3428571429 + 0.9716326526 = 1.3144897955
0.9716326526 + -1.971428571x + x2 = 1.3144897955

Factor a perfect square on the left side:
(x + -0.9857142855)(x + -0.9857142855) = 1.3144897955

Calculate the square root of the right side: 1.146512013

Break this problem into two subproblems by setting 
(x + -0.9857142855) equal to 1.146512013 and -1.146512013.

Subproblem 1

x + -0.9857142855 = 1.146512013 Simplifying x + -0.9857142855 = 1.146512013 Reorder the terms: -0.9857142855 + x = 1.146512013 Solving -0.9857142855 + x = 1.146512013 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9857142855' to each side of the equation. -0.9857142855 + 0.9857142855 + x = 1.146512013 + 0.9857142855 Combine like terms: -0.9857142855 + 0.9857142855 = 0.0000000000 0.0000000000 + x = 1.146512013 + 0.9857142855 x = 1.146512013 + 0.9857142855 Combine like terms: 1.146512013 + 0.9857142855 = 2.1322262985 x = 2.1322262985 Simplifying x = 2.1322262985

Subproblem 2

x + -0.9857142855 = -1.146512013 Simplifying x + -0.9857142855 = -1.146512013 Reorder the terms: -0.9857142855 + x = -1.146512013 Solving -0.9857142855 + x = -1.146512013 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9857142855' to each side of the equation. -0.9857142855 + 0.9857142855 + x = -1.146512013 + 0.9857142855 Combine like terms: -0.9857142855 + 0.9857142855 = 0.0000000000 0.0000000000 + x = -1.146512013 + 0.9857142855 x = -1.146512013 + 0.9857142855 Combine like terms: -1.146512013 + 0.9857142855 = -0.1607977275 x = -0.1607977275 Simplifying x = -0.1607977275

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1322262985, -0.1607977275}

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