x+1(11x-55)+6x(5x)=

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Solution for x+1(11x-55)+6x(5x)= equation:


Simplifying
x + 1(11x + -55) + 6x(5x) = 0

Reorder the terms:
x + 1(-55 + 11x) + 6x(5x) = 0
x + (-55 * 1 + 11x * 1) + 6x(5x) = 0
x + (-55 + 11x) + 6x(5x) = 0

Remove parenthesis around (5x)
x + -55 + 11x + 6x * 5x = 0

Reorder the terms for easier multiplication:
x + -55 + 11x + 6 * 5x * x = 0

Multiply 6 * 5
x + -55 + 11x + 30x * x = 0

Multiply x * x
x + -55 + 11x + 30x2 = 0

Reorder the terms:
-55 + x + 11x + 30x2 = 0

Combine like terms: x + 11x = 12x
-55 + 12x + 30x2 = 0

Solving
-55 + 12x + 30x2 = 0

Solving for variable 'x'.

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

Divide each side by '30'.
-1.833333333 + 0.4x + x2 = 0.0

Move the constant term to the right:

Add '1.833333333' to each side of the equation.
-1.833333333 + 0.4x + 1.833333333 + x2 = 0.0 + 1.833333333

Reorder the terms:
-1.833333333 + 1.833333333 + 0.4x + x2 = 0.0 + 1.833333333

Combine like terms: -1.833333333 + 1.833333333 = 0.000000000
0.000000000 + 0.4x + x2 = 0.0 + 1.833333333
0.4x + x2 = 0.0 + 1.833333333

Combine like terms: 0.0 + 1.833333333 = 1.833333333
0.4x + x2 = 1.833333333

The x term is 0.4x.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4x + 0.04 + x2 = 1.833333333 + 0.04

Reorder the terms:
0.04 + 0.4x + x2 = 1.833333333 + 0.04

Combine like terms: 1.833333333 + 0.04 = 1.873333333
0.04 + 0.4x + x2 = 1.873333333

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = 1.873333333

Calculate the square root of the right side: 1.368697678

Break this problem into two subproblems by setting 
(x + 0.2) equal to 1.368697678 and -1.368697678.

Subproblem 1

x + 0.2 = 1.368697678 Simplifying x + 0.2 = 1.368697678 Reorder the terms: 0.2 + x = 1.368697678 Solving 0.2 + x = 1.368697678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = 1.368697678 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = 1.368697678 + -0.2 x = 1.368697678 + -0.2 Combine like terms: 1.368697678 + -0.2 = 1.168697678 x = 1.168697678 Simplifying x = 1.168697678

Subproblem 2

x + 0.2 = -1.368697678 Simplifying x + 0.2 = -1.368697678 Reorder the terms: 0.2 + x = -1.368697678 Solving 0.2 + x = -1.368697678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = -1.368697678 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = -1.368697678 + -0.2 x = -1.368697678 + -0.2 Combine like terms: -1.368697678 + -0.2 = -1.568697678 x = -1.568697678 Simplifying x = -1.568697678

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.168697678, -1.568697678}

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