11x^2+7x-10=5

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Solution for 11x^2+7x-10=5 equation:


Simplifying
11x2 + 7x + -10 = 5

Reorder the terms:
-10 + 7x + 11x2 = 5

Solving
-10 + 7x + 11x2 = 5

Solving for variable 'x'.

Reorder the terms:
-10 + -5 + 7x + 11x2 = 5 + -5

Combine like terms: -10 + -5 = -15
-15 + 7x + 11x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-15 + 7x + 11x2 = 0

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

Divide each side by '11'.
-1.363636364 + 0.6363636364x + x2 = 0

Move the constant term to the right:

Add '1.363636364' to each side of the equation.
-1.363636364 + 0.6363636364x + 1.363636364 + x2 = 0 + 1.363636364

Reorder the terms:
-1.363636364 + 1.363636364 + 0.6363636364x + x2 = 0 + 1.363636364

Combine like terms: -1.363636364 + 1.363636364 = 0.000000000
0.000000000 + 0.6363636364x + x2 = 0 + 1.363636364
0.6363636364x + x2 = 0 + 1.363636364

Combine like terms: 0 + 1.363636364 = 1.363636364
0.6363636364x + x2 = 1.363636364

The x term is 0.6363636364x.  Take half its coefficient (0.3181818182).
Square it (0.1012396694) and add it to both sides.

Add '0.1012396694' to each side of the equation.
0.6363636364x + 0.1012396694 + x2 = 1.363636364 + 0.1012396694

Reorder the terms:
0.1012396694 + 0.6363636364x + x2 = 1.363636364 + 0.1012396694

Combine like terms: 1.363636364 + 0.1012396694 = 1.4648760334
0.1012396694 + 0.6363636364x + x2 = 1.4648760334

Factor a perfect square on the left side:
(x + 0.3181818182)(x + 0.3181818182) = 1.4648760334

Calculate the square root of the right side: 1.210320632

Break this problem into two subproblems by setting 
(x + 0.3181818182) equal to 1.210320632 and -1.210320632.

Subproblem 1

x + 0.3181818182 = 1.210320632 Simplifying x + 0.3181818182 = 1.210320632 Reorder the terms: 0.3181818182 + x = 1.210320632 Solving 0.3181818182 + x = 1.210320632 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3181818182' to each side of the equation. 0.3181818182 + -0.3181818182 + x = 1.210320632 + -0.3181818182 Combine like terms: 0.3181818182 + -0.3181818182 = 0.0000000000 0.0000000000 + x = 1.210320632 + -0.3181818182 x = 1.210320632 + -0.3181818182 Combine like terms: 1.210320632 + -0.3181818182 = 0.8921388138 x = 0.8921388138 Simplifying x = 0.8921388138

Subproblem 2

x + 0.3181818182 = -1.210320632 Simplifying x + 0.3181818182 = -1.210320632 Reorder the terms: 0.3181818182 + x = -1.210320632 Solving 0.3181818182 + x = -1.210320632 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3181818182' to each side of the equation. 0.3181818182 + -0.3181818182 + x = -1.210320632 + -0.3181818182 Combine like terms: 0.3181818182 + -0.3181818182 = 0.0000000000 0.0000000000 + x = -1.210320632 + -0.3181818182 x = -1.210320632 + -0.3181818182 Combine like terms: -1.210320632 + -0.3181818182 = -1.5285024502 x = -1.5285024502 Simplifying x = -1.5285024502

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.8921388138, -1.5285024502}

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