2x^2-12-1=-7x+6

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Solution for 2x^2-12-1=-7x+6 equation:


Simplifying
2x2 + -12 + -1 = -7x + 6

Reorder the terms:
-12 + -1 + 2x2 = -7x + 6

Combine like terms: -12 + -1 = -13
-13 + 2x2 = -7x + 6

Reorder the terms:
-13 + 2x2 = 6 + -7x

Solving
-13 + 2x2 = 6 + -7x

Solving for variable 'x'.

Reorder the terms:
-13 + -6 + 7x + 2x2 = 6 + -7x + -6 + 7x

Combine like terms: -13 + -6 = -19
-19 + 7x + 2x2 = 6 + -7x + -6 + 7x

Reorder the terms:
-19 + 7x + 2x2 = 6 + -6 + -7x + 7x

Combine like terms: 6 + -6 = 0
-19 + 7x + 2x2 = 0 + -7x + 7x
-19 + 7x + 2x2 = -7x + 7x

Combine like terms: -7x + 7x = 0
-19 + 7x + 2x2 = 0

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

Divide each side by '2'.
-9.5 + 3.5x + x2 = 0

Move the constant term to the right:

Add '9.5' to each side of the equation.
-9.5 + 3.5x + 9.5 + x2 = 0 + 9.5

Reorder the terms:
-9.5 + 9.5 + 3.5x + x2 = 0 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + 3.5x + x2 = 0 + 9.5
3.5x + x2 = 0 + 9.5

Combine like terms: 0 + 9.5 = 9.5
3.5x + x2 = 9.5

The x term is 3.5x.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5x + 3.0625 + x2 = 9.5 + 3.0625

Reorder the terms:
3.0625 + 3.5x + x2 = 9.5 + 3.0625

Combine like terms: 9.5 + 3.0625 = 12.5625
3.0625 + 3.5x + x2 = 12.5625

Factor a perfect square on the left side:
(x + 1.75)(x + 1.75) = 12.5625

Calculate the square root of the right side: 3.54436172

Break this problem into two subproblems by setting 
(x + 1.75) equal to 3.54436172 and -3.54436172.

Subproblem 1

x + 1.75 = 3.54436172 Simplifying x + 1.75 = 3.54436172 Reorder the terms: 1.75 + x = 3.54436172 Solving 1.75 + x = 3.54436172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = 3.54436172 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = 3.54436172 + -1.75 x = 3.54436172 + -1.75 Combine like terms: 3.54436172 + -1.75 = 1.79436172 x = 1.79436172 Simplifying x = 1.79436172

Subproblem 2

x + 1.75 = -3.54436172 Simplifying x + 1.75 = -3.54436172 Reorder the terms: 1.75 + x = -3.54436172 Solving 1.75 + x = -3.54436172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + x = -3.54436172 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + x = -3.54436172 + -1.75 x = -3.54436172 + -1.75 Combine like terms: -3.54436172 + -1.75 = -5.29436172 x = -5.29436172 Simplifying x = -5.29436172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.79436172, -5.29436172}

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