(3x^2+5x-6)-(-6x+5)=

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Solution for (3x^2+5x-6)-(-6x+5)= equation:


Simplifying
(3x2 + 5x + -6) + -1(-6x + 5) = 0

Reorder the terms:
(-6 + 5x + 3x2) + -1(-6x + 5) = 0

Remove parenthesis around (-6 + 5x + 3x2)
-6 + 5x + 3x2 + -1(-6x + 5) = 0

Reorder the terms:
-6 + 5x + 3x2 + -1(5 + -6x) = 0
-6 + 5x + 3x2 + (5 * -1 + -6x * -1) = 0
-6 + 5x + 3x2 + (-5 + 6x) = 0

Reorder the terms:
-6 + -5 + 5x + 6x + 3x2 = 0

Combine like terms: -6 + -5 = -11
-11 + 5x + 6x + 3x2 = 0

Combine like terms: 5x + 6x = 11x
-11 + 11x + 3x2 = 0

Solving
-11 + 11x + 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'.
-3.666666667 + 3.666666667x + x2 = 0

Move the constant term to the right:

Add '3.666666667' to each side of the equation.
-3.666666667 + 3.666666667x + 3.666666667 + x2 = 0 + 3.666666667

Reorder the terms:
-3.666666667 + 3.666666667 + 3.666666667x + x2 = 0 + 3.666666667

Combine like terms: -3.666666667 + 3.666666667 = 0.000000000
0.000000000 + 3.666666667x + x2 = 0 + 3.666666667
3.666666667x + x2 = 0 + 3.666666667

Combine like terms: 0 + 3.666666667 = 3.666666667
3.666666667x + x2 = 3.666666667

The x term is 3.666666667x.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667x + 3.361111114 + x2 = 3.666666667 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667x + x2 = 3.666666667 + 3.361111114

Combine like terms: 3.666666667 + 3.361111114 = 7.027777781
3.361111114 + 3.666666667x + x2 = 7.027777781

Factor a perfect square on the left side:
(x + 1.833333334)(x + 1.833333334) = 7.027777781

Calculate the square root of the right side: 2.650995621

Break this problem into two subproblems by setting 
(x + 1.833333334) equal to 2.650995621 and -2.650995621.

Subproblem 1

x + 1.833333334 = 2.650995621 Simplifying x + 1.833333334 = 2.650995621 Reorder the terms: 1.833333334 + x = 2.650995621 Solving 1.833333334 + x = 2.650995621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = 2.650995621 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = 2.650995621 + -1.833333334 x = 2.650995621 + -1.833333334 Combine like terms: 2.650995621 + -1.833333334 = 0.817662287 x = 0.817662287 Simplifying x = 0.817662287

Subproblem 2

x + 1.833333334 = -2.650995621 Simplifying x + 1.833333334 = -2.650995621 Reorder the terms: 1.833333334 + x = -2.650995621 Solving 1.833333334 + x = -2.650995621 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + x = -2.650995621 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + x = -2.650995621 + -1.833333334 x = -2.650995621 + -1.833333334 Combine like terms: -2.650995621 + -1.833333334 = -4.484328955 x = -4.484328955 Simplifying x = -4.484328955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.817662287, -4.484328955}

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