(6x^2)-(5x-6)+(7x^2-7)=

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Solution for (6x^2)-(5x-6)+(7x^2-7)= equation:


Simplifying
(6x2) + -1(5x + -6) + (7x2 + -7) = 0

Reorder the terms:
(6x2) + -1(-6 + 5x) + (7x2 + -7) = 0
(6x2) + (-6 * -1 + 5x * -1) + (7x2 + -7) = 0
(6x2) + (6 + -5x) + (7x2 + -7) = 0

Reorder the terms:
(6x2) + 6 + -5x + (-7 + 7x2) = 0

Remove parenthesis around (-7 + 7x2)
(6x2) + 6 + -5x + -7 + 7x2 = 0

Reorder the terms:
6 + -7 + -5x + (6x2) + 7x2 = 0

Combine like terms: 6 + -7 = -1
-1 + -5x + (6x2) + 7x2 = 0

Combine like terms: (6x2) + 7x2 = 13x2
-1 + -5x + 13x2 = 0

Solving
-1 + -5x + 13x2 = 0

Solving for variable 'x'.

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

Divide each side by '13'.
-0.07692307692 + -0.3846153846x + x2 = 0

Move the constant term to the right:

Add '0.07692307692' to each side of the equation.
-0.07692307692 + -0.3846153846x + 0.07692307692 + x2 = 0 + 0.07692307692

Reorder the terms:
-0.07692307692 + 0.07692307692 + -0.3846153846x + x2 = 0 + 0.07692307692

Combine like terms: -0.07692307692 + 0.07692307692 = 0.00000000000
0.00000000000 + -0.3846153846x + x2 = 0 + 0.07692307692
-0.3846153846x + x2 = 0 + 0.07692307692

Combine like terms: 0 + 0.07692307692 = 0.07692307692
-0.3846153846x + x2 = 0.07692307692

The x term is -0.3846153846x.  Take half its coefficient (-0.1923076923).
Square it (0.03698224852) and add it to both sides.

Add '0.03698224852' to each side of the equation.
-0.3846153846x + 0.03698224852 + x2 = 0.07692307692 + 0.03698224852

Reorder the terms:
0.03698224852 + -0.3846153846x + x2 = 0.07692307692 + 0.03698224852

Combine like terms: 0.07692307692 + 0.03698224852 = 0.11390532544
0.03698224852 + -0.3846153846x + x2 = 0.11390532544

Factor a perfect square on the left side:
(x + -0.1923076923)(x + -0.1923076923) = 0.11390532544

Calculate the square root of the right side: 0.33749863

Break this problem into two subproblems by setting 
(x + -0.1923076923) equal to 0.33749863 and -0.33749863.

Subproblem 1

x + -0.1923076923 = 0.33749863 Simplifying x + -0.1923076923 = 0.33749863 Reorder the terms: -0.1923076923 + x = 0.33749863 Solving -0.1923076923 + x = 0.33749863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1923076923' to each side of the equation. -0.1923076923 + 0.1923076923 + x = 0.33749863 + 0.1923076923 Combine like terms: -0.1923076923 + 0.1923076923 = 0.0000000000 0.0000000000 + x = 0.33749863 + 0.1923076923 x = 0.33749863 + 0.1923076923 Combine like terms: 0.33749863 + 0.1923076923 = 0.5298063223 x = 0.5298063223 Simplifying x = 0.5298063223

Subproblem 2

x + -0.1923076923 = -0.33749863 Simplifying x + -0.1923076923 = -0.33749863 Reorder the terms: -0.1923076923 + x = -0.33749863 Solving -0.1923076923 + x = -0.33749863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1923076923' to each side of the equation. -0.1923076923 + 0.1923076923 + x = -0.33749863 + 0.1923076923 Combine like terms: -0.1923076923 + 0.1923076923 = 0.0000000000 0.0000000000 + x = -0.33749863 + 0.1923076923 x = -0.33749863 + 0.1923076923 Combine like terms: -0.33749863 + 0.1923076923 = -0.1451909377 x = -0.1451909377 Simplifying x = -0.1451909377

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5298063223, -0.1451909377}

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