11c^2+12c-10=0

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Solution for 11c^2+12c-10=0 equation:


Simplifying
11c2 + 12c + -10 = 0

Reorder the terms:
-10 + 12c + 11c2 = 0

Solving
-10 + 12c + 11c2 = 0

Solving for variable 'c'.

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

Divide each side by '11'.
-0.9090909091 + 1.090909091c + c2 = 0

Move the constant term to the right:

Add '0.9090909091' to each side of the equation.
-0.9090909091 + 1.090909091c + 0.9090909091 + c2 = 0 + 0.9090909091

Reorder the terms:
-0.9090909091 + 0.9090909091 + 1.090909091c + c2 = 0 + 0.9090909091

Combine like terms: -0.9090909091 + 0.9090909091 = 0.0000000000
0.0000000000 + 1.090909091c + c2 = 0 + 0.9090909091
1.090909091c + c2 = 0 + 0.9090909091

Combine like terms: 0 + 0.9090909091 = 0.9090909091
1.090909091c + c2 = 0.9090909091

The c term is 1.090909091c.  Take half its coefficient (0.5454545455).
Square it (0.2975206612) and add it to both sides.

Add '0.2975206612' to each side of the equation.
1.090909091c + 0.2975206612 + c2 = 0.9090909091 + 0.2975206612

Reorder the terms:
0.2975206612 + 1.090909091c + c2 = 0.9090909091 + 0.2975206612

Combine like terms: 0.9090909091 + 0.2975206612 = 1.2066115703
0.2975206612 + 1.090909091c + c2 = 1.2066115703

Factor a perfect square on the left side:
(c + 0.5454545455)(c + 0.5454545455) = 1.2066115703

Calculate the square root of the right side: 1.098458725

Break this problem into two subproblems by setting 
(c + 0.5454545455) equal to 1.098458725 and -1.098458725.

Subproblem 1

c + 0.5454545455 = 1.098458725 Simplifying c + 0.5454545455 = 1.098458725 Reorder the terms: 0.5454545455 + c = 1.098458725 Solving 0.5454545455 + c = 1.098458725 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + c = 1.098458725 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + c = 1.098458725 + -0.5454545455 c = 1.098458725 + -0.5454545455 Combine like terms: 1.098458725 + -0.5454545455 = 0.5530041795 c = 0.5530041795 Simplifying c = 0.5530041795

Subproblem 2

c + 0.5454545455 = -1.098458725 Simplifying c + 0.5454545455 = -1.098458725 Reorder the terms: 0.5454545455 + c = -1.098458725 Solving 0.5454545455 + c = -1.098458725 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-0.5454545455' to each side of the equation. 0.5454545455 + -0.5454545455 + c = -1.098458725 + -0.5454545455 Combine like terms: 0.5454545455 + -0.5454545455 = 0.0000000000 0.0000000000 + c = -1.098458725 + -0.5454545455 c = -1.098458725 + -0.5454545455 Combine like terms: -1.098458725 + -0.5454545455 = -1.6439132705 c = -1.6439132705 Simplifying c = -1.6439132705

Solution

The solution to the problem is based on the solutions from the subproblems. c = {0.5530041795, -1.6439132705}

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