(6x+7)(11x-2)=180

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Solution for (6x+7)(11x-2)=180 equation:


Simplifying
(6x + 7)(11x + -2) = 180

Reorder the terms:
(7 + 6x)(11x + -2) = 180

Reorder the terms:
(7 + 6x)(-2 + 11x) = 180

Multiply (7 + 6x) * (-2 + 11x)
(7(-2 + 11x) + 6x * (-2 + 11x)) = 180
((-2 * 7 + 11x * 7) + 6x * (-2 + 11x)) = 180
((-14 + 77x) + 6x * (-2 + 11x)) = 180
(-14 + 77x + (-2 * 6x + 11x * 6x)) = 180
(-14 + 77x + (-12x + 66x2)) = 180

Combine like terms: 77x + -12x = 65x
(-14 + 65x + 66x2) = 180

Solving
-14 + 65x + 66x2 = 180

Solving for variable 'x'.

Reorder the terms:
-14 + -180 + 65x + 66x2 = 180 + -180

Combine like terms: -14 + -180 = -194
-194 + 65x + 66x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-194 + 65x + 66x2 = 0

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

Divide each side by '66'.
-2.939393939 + 0.9848484848x + x2 = 0

Move the constant term to the right:

Add '2.939393939' to each side of the equation.
-2.939393939 + 0.9848484848x + 2.939393939 + x2 = 0 + 2.939393939

Reorder the terms:
-2.939393939 + 2.939393939 + 0.9848484848x + x2 = 0 + 2.939393939

Combine like terms: -2.939393939 + 2.939393939 = 0.000000000
0.000000000 + 0.9848484848x + x2 = 0 + 2.939393939
0.9848484848x + x2 = 0 + 2.939393939

Combine like terms: 0 + 2.939393939 = 2.939393939
0.9848484848x + x2 = 2.939393939

The x term is 0.9848484848x.  Take half its coefficient (0.4924242424).
Square it (0.2424816345) and add it to both sides.

Add '0.2424816345' to each side of the equation.
0.9848484848x + 0.2424816345 + x2 = 2.939393939 + 0.2424816345

Reorder the terms:
0.2424816345 + 0.9848484848x + x2 = 2.939393939 + 0.2424816345

Combine like terms: 2.939393939 + 0.2424816345 = 3.1818755735
0.2424816345 + 0.9848484848x + x2 = 3.1818755735

Factor a perfect square on the left side:
(x + 0.4924242424)(x + 0.4924242424) = 3.1818755735

Calculate the square root of the right side: 1.783781257

Break this problem into two subproblems by setting 
(x + 0.4924242424) equal to 1.783781257 and -1.783781257.

Subproblem 1

x + 0.4924242424 = 1.783781257 Simplifying x + 0.4924242424 = 1.783781257 Reorder the terms: 0.4924242424 + x = 1.783781257 Solving 0.4924242424 + x = 1.783781257 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4924242424' to each side of the equation. 0.4924242424 + -0.4924242424 + x = 1.783781257 + -0.4924242424 Combine like terms: 0.4924242424 + -0.4924242424 = 0.0000000000 0.0000000000 + x = 1.783781257 + -0.4924242424 x = 1.783781257 + -0.4924242424 Combine like terms: 1.783781257 + -0.4924242424 = 1.2913570146 x = 1.2913570146 Simplifying x = 1.2913570146

Subproblem 2

x + 0.4924242424 = -1.783781257 Simplifying x + 0.4924242424 = -1.783781257 Reorder the terms: 0.4924242424 + x = -1.783781257 Solving 0.4924242424 + x = -1.783781257 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4924242424' to each side of the equation. 0.4924242424 + -0.4924242424 + x = -1.783781257 + -0.4924242424 Combine like terms: 0.4924242424 + -0.4924242424 = 0.0000000000 0.0000000000 + x = -1.783781257 + -0.4924242424 x = -1.783781257 + -0.4924242424 Combine like terms: -1.783781257 + -0.4924242424 = -2.2762054994 x = -2.2762054994 Simplifying x = -2.2762054994

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2913570146, -2.2762054994}

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