X+1.732050808+3X^2-9=0

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Solution for X+1.732050808+3X^2-9=0 equation:


Simplifying
X + 1.732050808 + 3X2 + -9 = 0

Reorder the terms:
1.732050808 + -9 + X + 3X2 = 0

Combine like terms: 1.732050808 + -9 = -7.267949192
-7.267949192 + X + 3X2 = 0

Solving
-7.267949192 + X + 3X2 = 0

Solving for variable 'X'.

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

Divide each side by '3'.
-2.422649731 + 0.3333333333X + X2 = 0

Move the constant term to the right:

Add '2.422649731' to each side of the equation.
-2.422649731 + 0.3333333333X + 2.422649731 + X2 = 0 + 2.422649731

Reorder the terms:
-2.422649731 + 2.422649731 + 0.3333333333X + X2 = 0 + 2.422649731

Combine like terms: -2.422649731 + 2.422649731 = 0.000000000
0.000000000 + 0.3333333333X + X2 = 0 + 2.422649731
0.3333333333X + X2 = 0 + 2.422649731

Combine like terms: 0 + 2.422649731 = 2.422649731
0.3333333333X + X2 = 2.422649731

The X term is X.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.3333333333X + 0.25 + X2 = 2.422649731 + 0.25

Reorder the terms:
0.25 + 0.3333333333X + X2 = 2.422649731 + 0.25

Combine like terms: 2.422649731 + 0.25 = 2.672649731
0.25 + 0.3333333333X + X2 = 2.672649731

Factor a perfect square on the left side:
(X + 0.5)(X + 0.5) = 2.672649731

Calculate the square root of the right side: 1.634824067

Break this problem into two subproblems by setting 
(X + 0.5) equal to 1.634824067 and -1.634824067.

Subproblem 1

X + 0.5 = 1.634824067 Simplifying X + 0.5 = 1.634824067 Reorder the terms: 0.5 + X = 1.634824067 Solving 0.5 + X = 1.634824067 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = 1.634824067 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = 1.634824067 + -0.5 X = 1.634824067 + -0.5 Combine like terms: 1.634824067 + -0.5 = 1.134824067 X = 1.134824067 Simplifying X = 1.134824067

Subproblem 2

X + 0.5 = -1.634824067 Simplifying X + 0.5 = -1.634824067 Reorder the terms: 0.5 + X = -1.634824067 Solving 0.5 + X = -1.634824067 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = -1.634824067 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = -1.634824067 + -0.5 X = -1.634824067 + -0.5 Combine like terms: -1.634824067 + -0.5 = -2.134824067 X = -2.134824067 Simplifying X = -2.134824067

Solution

The solution to the problem is based on the solutions from the subproblems. X = {1.134824067, -2.134824067}

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