(6x+2x-2)-(5x^2-8x-6)=

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Solution for (6x+2x-2)-(5x^2-8x-6)= equation:


Simplifying
(6x + 2x + -2) + -1(5x2 + -8x + -6) = 0

Reorder the terms:
(-2 + 6x + 2x) + -1(5x2 + -8x + -6) = 0

Combine like terms: 6x + 2x = 8x
(-2 + 8x) + -1(5x2 + -8x + -6) = 0

Remove parenthesis around (-2 + 8x)
-2 + 8x + -1(5x2 + -8x + -6) = 0

Reorder the terms:
-2 + 8x + -1(-6 + -8x + 5x2) = 0
-2 + 8x + (-6 * -1 + -8x * -1 + 5x2 * -1) = 0
-2 + 8x + (6 + 8x + -5x2) = 0

Reorder the terms:
-2 + 6 + 8x + 8x + -5x2 = 0

Combine like terms: -2 + 6 = 4
4 + 8x + 8x + -5x2 = 0

Combine like terms: 8x + 8x = 16x
4 + 16x + -5x2 = 0

Solving
4 + 16x + -5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-0.8 + -3.2x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + -3.2x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + -3.2x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + -3.2x + x2 = 0 + 0.8
-3.2x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
-3.2x + x2 = 0.8

The x term is -3.2x.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2x + 2.56 + x2 = 0.8 + 2.56

Reorder the terms:
2.56 + -3.2x + x2 = 0.8 + 2.56

Combine like terms: 0.8 + 2.56 = 3.36
2.56 + -3.2x + x2 = 3.36

Factor a perfect square on the left side:
(x + -1.6)(x + -1.6) = 3.36

Calculate the square root of the right side: 1.833030278

Break this problem into two subproblems by setting 
(x + -1.6) equal to 1.833030278 and -1.833030278.

Subproblem 1

x + -1.6 = 1.833030278 Simplifying x + -1.6 = 1.833030278 Reorder the terms: -1.6 + x = 1.833030278 Solving -1.6 + x = 1.833030278 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = 1.833030278 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = 1.833030278 + 1.6 x = 1.833030278 + 1.6 Combine like terms: 1.833030278 + 1.6 = 3.433030278 x = 3.433030278 Simplifying x = 3.433030278

Subproblem 2

x + -1.6 = -1.833030278 Simplifying x + -1.6 = -1.833030278 Reorder the terms: -1.6 + x = -1.833030278 Solving -1.6 + x = -1.833030278 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = -1.833030278 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = -1.833030278 + 1.6 x = -1.833030278 + 1.6 Combine like terms: -1.833030278 + 1.6 = -0.233030278 x = -0.233030278 Simplifying x = -0.233030278

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.433030278, -0.233030278}

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