3x^2+x-442=0

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Solution for 3x^2+x-442=0 equation:


Simplifying
3x2 + x + -442 = 0

Reorder the terms:
-442 + x + 3x2 = 0

Solving
-442 + 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'.
-147.3333333 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '147.3333333' to each side of the equation.
-147.3333333 + 0.3333333333x + 147.3333333 + x2 = 0 + 147.3333333

Reorder the terms:
-147.3333333 + 147.3333333 + 0.3333333333x + x2 = 0 + 147.3333333

Combine like terms: -147.3333333 + 147.3333333 = 0.0000000
0.0000000 + 0.3333333333x + x2 = 0 + 147.3333333
0.3333333333x + x2 = 0 + 147.3333333

Combine like terms: 0 + 147.3333333 = 147.3333333
0.3333333333x + x2 = 147.3333333

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 = 147.3333333 + 0.25

Reorder the terms:
0.25 + 0.3333333333x + x2 = 147.3333333 + 0.25

Combine like terms: 147.3333333 + 0.25 = 147.5833333
0.25 + 0.3333333333x + x2 = 147.5833333

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 147.5833333

Calculate the square root of the right side: 12.148388095

Break this problem into two subproblems by setting 
(x + 0.5) equal to 12.148388095 and -12.148388095.

Subproblem 1

x + 0.5 = 12.148388095 Simplifying x + 0.5 = 12.148388095 Reorder the terms: 0.5 + x = 12.148388095 Solving 0.5 + x = 12.148388095 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 = 12.148388095 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 12.148388095 + -0.5 x = 12.148388095 + -0.5 Combine like terms: 12.148388095 + -0.5 = 11.648388095 x = 11.648388095 Simplifying x = 11.648388095

Subproblem 2

x + 0.5 = -12.148388095 Simplifying x + 0.5 = -12.148388095 Reorder the terms: 0.5 + x = -12.148388095 Solving 0.5 + x = -12.148388095 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 = -12.148388095 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -12.148388095 + -0.5 x = -12.148388095 + -0.5 Combine like terms: -12.148388095 + -0.5 = -12.648388095 x = -12.648388095 Simplifying x = -12.648388095

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.648388095, -12.648388095}

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