0=0.4375-3.5x+6x^2

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Solution for 0=0.4375-3.5x+6x^2 equation:


Simplifying
0 = 0.4375 + -3.5x + 6x2

Solving
0 = 0.4375 + -3.5x + 6x2

Solving for variable 'x'.

Combine like terms: 0 + -0.4375 = -0.4375
-0.4375 + 3.5x + -6x2 = 0.4375 + -3.5x + 6x2 + -0.4375 + 3.5x + -6x2

Reorder the terms:
-0.4375 + 3.5x + -6x2 = 0.4375 + -0.4375 + -3.5x + 3.5x + 6x2 + -6x2

Combine like terms: 0.4375 + -0.4375 = 0.0000
-0.4375 + 3.5x + -6x2 = 0.0000 + -3.5x + 3.5x + 6x2 + -6x2
-0.4375 + 3.5x + -6x2 = -3.5x + 3.5x + 6x2 + -6x2

Combine like terms: -3.5x + 3.5x = 0.0
-0.4375 + 3.5x + -6x2 = 0.0 + 6x2 + -6x2
-0.4375 + 3.5x + -6x2 = 6x2 + -6x2

Combine like terms: 6x2 + -6x2 = 0
-0.4375 + 3.5x + -6x2 = 0

Begin completing the square.  Divide all terms by
-6 the coefficient of the squared term: 

Divide each side by '-6'.
0.07291666667 + -0.5833333333x + x2 = 0

Move the constant term to the right:

Add '-0.07291666667' to each side of the equation.
0.07291666667 + -0.5833333333x + -0.07291666667 + x2 = 0 + -0.07291666667

Reorder the terms:
0.07291666667 + -0.07291666667 + -0.5833333333x + x2 = 0 + -0.07291666667

Combine like terms: 0.07291666667 + -0.07291666667 = 0.00000000000
0.00000000000 + -0.5833333333x + x2 = 0 + -0.07291666667
-0.5833333333x + x2 = 0 + -0.07291666667

Combine like terms: 0 + -0.07291666667 = -0.07291666667
-0.5833333333x + x2 = -0.07291666667

The x term is -0.5833333333x.  Take half its coefficient (-0.2916666667).
Square it (0.08506944446) and add it to both sides.

Add '0.08506944446' to each side of the equation.
-0.5833333333x + 0.08506944446 + x2 = -0.07291666667 + 0.08506944446

Reorder the terms:
0.08506944446 + -0.5833333333x + x2 = -0.07291666667 + 0.08506944446

Combine like terms: -0.07291666667 + 0.08506944446 = 0.01215277779
0.08506944446 + -0.5833333333x + x2 = 0.01215277779

Factor a perfect square on the left side:
(x + -0.2916666667)(x + -0.2916666667) = 0.01215277779

Calculate the square root of the right side: 0.110239638

Break this problem into two subproblems by setting 
(x + -0.2916666667) equal to 0.110239638 and -0.110239638.

Subproblem 1

x + -0.2916666667 = 0.110239638 Simplifying x + -0.2916666667 = 0.110239638 Reorder the terms: -0.2916666667 + x = 0.110239638 Solving -0.2916666667 + x = 0.110239638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = 0.110239638 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = 0.110239638 + 0.2916666667 x = 0.110239638 + 0.2916666667 Combine like terms: 0.110239638 + 0.2916666667 = 0.4019063047 x = 0.4019063047 Simplifying x = 0.4019063047

Subproblem 2

x + -0.2916666667 = -0.110239638 Simplifying x + -0.2916666667 = -0.110239638 Reorder the terms: -0.2916666667 + x = -0.110239638 Solving -0.2916666667 + x = -0.110239638 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.2916666667' to each side of the equation. -0.2916666667 + 0.2916666667 + x = -0.110239638 + 0.2916666667 Combine like terms: -0.2916666667 + 0.2916666667 = 0.0000000000 0.0000000000 + x = -0.110239638 + 0.2916666667 x = -0.110239638 + 0.2916666667 Combine like terms: -0.110239638 + 0.2916666667 = 0.1814270287 x = 0.1814270287 Simplifying x = 0.1814270287

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.4019063047, 0.1814270287}

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