0=3x^2-42x+110

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Solution for 0=3x^2-42x+110 equation:


Simplifying
0 = 3x2 + -42x + 110

Reorder the terms:
0 = 110 + -42x + 3x2

Solving
0 = 110 + -42x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + -110 = -110
-110 + 42x + -3x2 = 110 + -42x + 3x2 + -110 + 42x + -3x2

Reorder the terms:
-110 + 42x + -3x2 = 110 + -110 + -42x + 42x + 3x2 + -3x2

Combine like terms: 110 + -110 = 0
-110 + 42x + -3x2 = 0 + -42x + 42x + 3x2 + -3x2
-110 + 42x + -3x2 = -42x + 42x + 3x2 + -3x2

Combine like terms: -42x + 42x = 0
-110 + 42x + -3x2 = 0 + 3x2 + -3x2
-110 + 42x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-110 + 42x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
36.66666667 + -14x + x2 = 0

Move the constant term to the right:

Add '-36.66666667' to each side of the equation.
36.66666667 + -14x + -36.66666667 + x2 = 0 + -36.66666667

Reorder the terms:
36.66666667 + -36.66666667 + -14x + x2 = 0 + -36.66666667

Combine like terms: 36.66666667 + -36.66666667 = 0.00000000
0.00000000 + -14x + x2 = 0 + -36.66666667
-14x + x2 = 0 + -36.66666667

Combine like terms: 0 + -36.66666667 = -36.66666667
-14x + x2 = -36.66666667

The x term is -14x.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14x + 49 + x2 = -36.66666667 + 49

Reorder the terms:
49 + -14x + x2 = -36.66666667 + 49

Combine like terms: -36.66666667 + 49 = 12.33333333
49 + -14x + x2 = 12.33333333

Factor a perfect square on the left side:
(x + -7)(x + -7) = 12.33333333

Calculate the square root of the right side: 3.511884584

Break this problem into two subproblems by setting 
(x + -7) equal to 3.511884584 and -3.511884584.

Subproblem 1

x + -7 = 3.511884584 Simplifying x + -7 = 3.511884584 Reorder the terms: -7 + x = 3.511884584 Solving -7 + x = 3.511884584 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = 3.511884584 + 7 Combine like terms: -7 + 7 = 0 0 + x = 3.511884584 + 7 x = 3.511884584 + 7 Combine like terms: 3.511884584 + 7 = 10.511884584 x = 10.511884584 Simplifying x = 10.511884584

Subproblem 2

x + -7 = -3.511884584 Simplifying x + -7 = -3.511884584 Reorder the terms: -7 + x = -3.511884584 Solving -7 + x = -3.511884584 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + x = -3.511884584 + 7 Combine like terms: -7 + 7 = 0 0 + x = -3.511884584 + 7 x = -3.511884584 + 7 Combine like terms: -3.511884584 + 7 = 3.488115416 x = 3.488115416 Simplifying x = 3.488115416

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.511884584, 3.488115416}

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