0.3333333x^2+7x-7=-x+1

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Solution for 0.3333333x^2+7x-7=-x+1 equation:


Simplifying
0.3333333x2 + 7x + -7 = -1x + 1

Reorder the terms:
-7 + 7x + 0.3333333x2 = -1x + 1

Reorder the terms:
-7 + 7x + 0.3333333x2 = 1 + -1x

Solving
-7 + 7x + 0.3333333x2 = 1 + -1x

Solving for variable 'x'.

Reorder the terms:
-7 + -1 + 7x + x + 0.3333333x2 = 1 + -1x + -1 + x

Combine like terms: -7 + -1 = -8
-8 + 7x + x + 0.3333333x2 = 1 + -1x + -1 + x

Combine like terms: 7x + x = 8x
-8 + 8x + 0.3333333x2 = 1 + -1x + -1 + x

Reorder the terms:
-8 + 8x + 0.3333333x2 = 1 + -1 + -1x + x

Combine like terms: 1 + -1 = 0
-8 + 8x + 0.3333333x2 = 0 + -1x + x
-8 + 8x + 0.3333333x2 = -1x + x

Combine like terms: -1x + x = 0
-8 + 8x + 0.3333333x2 = 0

Begin completing the square.  Divide all terms by
0.3333333 the coefficient of the squared term: 

Divide each side by '0.3333333'.
-24.0000024 + 24.0000024x + x2 = 0

Move the constant term to the right:

Add '24.0000024' to each side of the equation.
-24.0000024 + 24.0000024x + 24.0000024 + x2 = 0 + 24.0000024

Reorder the terms:
-24.0000024 + 24.0000024 + 24.0000024x + x2 = 0 + 24.0000024

Combine like terms: -24.0000024 + 24.0000024 = 0.0000000
0.0000000 + 24.0000024x + x2 = 0 + 24.0000024
24.0000024x + x2 = 0 + 24.0000024

Combine like terms: 0 + 24.0000024 = 24.0000024
24.0000024x + x2 = 24.0000024

The x term is 24.0000024x.  Take half its coefficient (12.0000012).
Square it (144.0000288) and add it to both sides.

Add '144.0000288' to each side of the equation.
24.0000024x + 144.0000288 + x2 = 24.0000024 + 144.0000288

Reorder the terms:
144.0000288 + 24.0000024x + x2 = 24.0000024 + 144.0000288

Combine like terms: 24.0000024 + 144.0000288 = 168.0000312
144.0000288 + 24.0000024x + x2 = 168.0000312

Factor a perfect square on the left side:
(x + 12.0000012)(x + 12.0000012) = 168.0000312

Calculate the square root of the right side: 12.9614826

Break this problem into two subproblems by setting 
(x + 12.0000012) equal to 12.9614826 and -12.9614826.

Subproblem 1

x + 12.0000012 = 12.9614826 Simplifying x + 12.0000012 = 12.9614826 Reorder the terms: 12.0000012 + x = 12.9614826 Solving 12.0000012 + x = 12.9614826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.0000012' to each side of the equation. 12.0000012 + -12.0000012 + x = 12.9614826 + -12.0000012 Combine like terms: 12.0000012 + -12.0000012 = 0.0000000 0.0000000 + x = 12.9614826 + -12.0000012 x = 12.9614826 + -12.0000012 Combine like terms: 12.9614826 + -12.0000012 = 0.9614814 x = 0.9614814 Simplifying x = 0.9614814

Subproblem 2

x + 12.0000012 = -12.9614826 Simplifying x + 12.0000012 = -12.9614826 Reorder the terms: 12.0000012 + x = -12.9614826 Solving 12.0000012 + x = -12.9614826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12.0000012' to each side of the equation. 12.0000012 + -12.0000012 + x = -12.9614826 + -12.0000012 Combine like terms: 12.0000012 + -12.0000012 = 0.0000000 0.0000000 + x = -12.9614826 + -12.0000012 x = -12.9614826 + -12.0000012 Combine like terms: -12.9614826 + -12.0000012 = -24.9614838 x = -24.9614838 Simplifying x = -24.9614838

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9614814, -24.9614838}

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