12x^2-46x+15=0

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Solution for 12x^2-46x+15=0 equation:


Simplifying
12x2 + -46x + 15 = 0

Reorder the terms:
15 + -46x + 12x2 = 0

Solving
15 + -46x + 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'.
1.25 + -3.833333333x + x2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -3.833333333x + -1.25 + x2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -3.833333333x + x2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -3.833333333x + x2 = 0 + -1.25
-3.833333333x + x2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-3.833333333x + x2 = -1.25

The x term is -3.833333333x.  Take half its coefficient (-1.916666667).
Square it (3.673611112) and add it to both sides.

Add '3.673611112' to each side of the equation.
-3.833333333x + 3.673611112 + x2 = -1.25 + 3.673611112

Reorder the terms:
3.673611112 + -3.833333333x + x2 = -1.25 + 3.673611112

Combine like terms: -1.25 + 3.673611112 = 2.423611112
3.673611112 + -3.833333333x + x2 = 2.423611112

Factor a perfect square on the left side:
(x + -1.916666667)(x + -1.916666667) = 2.423611112

Calculate the square root of the right side: 1.556795141

Break this problem into two subproblems by setting 
(x + -1.916666667) equal to 1.556795141 and -1.556795141.

Subproblem 1

x + -1.916666667 = 1.556795141 Simplifying x + -1.916666667 = 1.556795141 Reorder the terms: -1.916666667 + x = 1.556795141 Solving -1.916666667 + x = 1.556795141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.916666667' to each side of the equation. -1.916666667 + 1.916666667 + x = 1.556795141 + 1.916666667 Combine like terms: -1.916666667 + 1.916666667 = 0.000000000 0.000000000 + x = 1.556795141 + 1.916666667 x = 1.556795141 + 1.916666667 Combine like terms: 1.556795141 + 1.916666667 = 3.473461808 x = 3.473461808 Simplifying x = 3.473461808

Subproblem 2

x + -1.916666667 = -1.556795141 Simplifying x + -1.916666667 = -1.556795141 Reorder the terms: -1.916666667 + x = -1.556795141 Solving -1.916666667 + x = -1.556795141 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.916666667' to each side of the equation. -1.916666667 + 1.916666667 + x = -1.556795141 + 1.916666667 Combine like terms: -1.916666667 + 1.916666667 = 0.000000000 0.000000000 + x = -1.556795141 + 1.916666667 x = -1.556795141 + 1.916666667 Combine like terms: -1.556795141 + 1.916666667 = 0.359871526 x = 0.359871526 Simplifying x = 0.359871526

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.473461808, 0.359871526}

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