11x^2+2x-154=0

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Solution for 11x^2+2x-154=0 equation:


Simplifying
11x2 + 2x + -154 = 0

Reorder the terms:
-154 + 2x + 11x2 = 0

Solving
-154 + 2x + 11x2 = 0

Solving for variable 'x'.

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

Divide each side by '11'.
-14 + 0.1818181818x + x2 = 0

Move the constant term to the right:

Add '14' to each side of the equation.
-14 + 0.1818181818x + 14 + x2 = 0 + 14

Reorder the terms:
-14 + 14 + 0.1818181818x + x2 = 0 + 14

Combine like terms: -14 + 14 = 0
0 + 0.1818181818x + x2 = 0 + 14
0.1818181818x + x2 = 0 + 14

Combine like terms: 0 + 14 = 14
0.1818181818x + x2 = 14

The x term is 0.1818181818x.  Take half its coefficient (0.0909090909).
Square it (0.008264462808) and add it to both sides.

Add '0.008264462808' to each side of the equation.
0.1818181818x + 0.008264462808 + x2 = 14 + 0.008264462808

Reorder the terms:
0.008264462808 + 0.1818181818x + x2 = 14 + 0.008264462808

Combine like terms: 14 + 0.008264462808 = 14.008264462808
0.008264462808 + 0.1818181818x + x2 = 14.008264462808

Factor a perfect square on the left side:
(x + 0.0909090909)(x + 0.0909090909) = 14.008264462808

Calculate the square root of the right side: 3.742761609

Break this problem into two subproblems by setting 
(x + 0.0909090909) equal to 3.742761609 and -3.742761609.

Subproblem 1

x + 0.0909090909 = 3.742761609 Simplifying x + 0.0909090909 = 3.742761609 Reorder the terms: 0.0909090909 + x = 3.742761609 Solving 0.0909090909 + x = 3.742761609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = 3.742761609 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = 3.742761609 + -0.0909090909 x = 3.742761609 + -0.0909090909 Combine like terms: 3.742761609 + -0.0909090909 = 3.6518525181 x = 3.6518525181 Simplifying x = 3.6518525181

Subproblem 2

x + 0.0909090909 = -3.742761609 Simplifying x + 0.0909090909 = -3.742761609 Reorder the terms: 0.0909090909 + x = -3.742761609 Solving 0.0909090909 + x = -3.742761609 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.0909090909' to each side of the equation. 0.0909090909 + -0.0909090909 + x = -3.742761609 + -0.0909090909 Combine like terms: 0.0909090909 + -0.0909090909 = 0.0000000000 0.0000000000 + x = -3.742761609 + -0.0909090909 x = -3.742761609 + -0.0909090909 Combine like terms: -3.742761609 + -0.0909090909 = -3.8336706999 x = -3.8336706999 Simplifying x = -3.8336706999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.6518525181, -3.8336706999}

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