12x^2-55x-7=

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Solution for 12x^2-55x-7= equation:


Simplifying
12x2 + -55x + -7 = 0

Reorder the terms:
-7 + -55x + 12x2 = 0

Solving
-7 + -55x + 12x2 = 0

Solving for variable 'x'.

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

Divide each side by '12'.
-0.5833333333 + -4.583333333x + x2 = 0

Move the constant term to the right:

Add '0.5833333333' to each side of the equation.
-0.5833333333 + -4.583333333x + 0.5833333333 + x2 = 0 + 0.5833333333

Reorder the terms:
-0.5833333333 + 0.5833333333 + -4.583333333x + x2 = 0 + 0.5833333333

Combine like terms: -0.5833333333 + 0.5833333333 = 0.0000000000
0.0000000000 + -4.583333333x + x2 = 0 + 0.5833333333
-4.583333333x + x2 = 0 + 0.5833333333

Combine like terms: 0 + 0.5833333333 = 0.5833333333
-4.583333333x + x2 = 0.5833333333

The x term is -4.583333333x.  Take half its coefficient (-2.291666667).
Square it (5.251736113) and add it to both sides.

Add '5.251736113' to each side of the equation.
-4.583333333x + 5.251736113 + x2 = 0.5833333333 + 5.251736113

Reorder the terms:
5.251736113 + -4.583333333x + x2 = 0.5833333333 + 5.251736113

Combine like terms: 0.5833333333 + 5.251736113 = 5.8350694463
5.251736113 + -4.583333333x + x2 = 5.8350694463

Factor a perfect square on the left side:
(x + -2.291666667)(x + -2.291666667) = 5.8350694463

Calculate the square root of the right side: 2.41558884

Break this problem into two subproblems by setting 
(x + -2.291666667) equal to 2.41558884 and -2.41558884.

Subproblem 1

x + -2.291666667 = 2.41558884 Simplifying x + -2.291666667 = 2.41558884 Reorder the terms: -2.291666667 + x = 2.41558884 Solving -2.291666667 + x = 2.41558884 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.291666667' to each side of the equation. -2.291666667 + 2.291666667 + x = 2.41558884 + 2.291666667 Combine like terms: -2.291666667 + 2.291666667 = 0.000000000 0.000000000 + x = 2.41558884 + 2.291666667 x = 2.41558884 + 2.291666667 Combine like terms: 2.41558884 + 2.291666667 = 4.707255507 x = 4.707255507 Simplifying x = 4.707255507

Subproblem 2

x + -2.291666667 = -2.41558884 Simplifying x + -2.291666667 = -2.41558884 Reorder the terms: -2.291666667 + x = -2.41558884 Solving -2.291666667 + x = -2.41558884 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.291666667' to each side of the equation. -2.291666667 + 2.291666667 + x = -2.41558884 + 2.291666667 Combine like terms: -2.291666667 + 2.291666667 = 0.000000000 0.000000000 + x = -2.41558884 + 2.291666667 x = -2.41558884 + 2.291666667 Combine like terms: -2.41558884 + 2.291666667 = -0.123922173 x = -0.123922173 Simplifying x = -0.123922173

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.707255507, -0.123922173}

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