(6x^2-4x-5)-(-2x^2-x+4)=0

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Solution for (6x^2-4x-5)-(-2x^2-x+4)=0 equation:


Simplifying
(6x2 + -4x + -5) + -1(-2x2 + -1x + 4) = 0

Reorder the terms:
(-5 + -4x + 6x2) + -1(-2x2 + -1x + 4) = 0

Remove parenthesis around (-5 + -4x + 6x2)
-5 + -4x + 6x2 + -1(-2x2 + -1x + 4) = 0

Reorder the terms:
-5 + -4x + 6x2 + -1(4 + -1x + -2x2) = 0
-5 + -4x + 6x2 + (4 * -1 + -1x * -1 + -2x2 * -1) = 0
-5 + -4x + 6x2 + (-4 + 1x + 2x2) = 0

Reorder the terms:
-5 + -4 + -4x + 1x + 6x2 + 2x2 = 0

Combine like terms: -5 + -4 = -9
-9 + -4x + 1x + 6x2 + 2x2 = 0

Combine like terms: -4x + 1x = -3x
-9 + -3x + 6x2 + 2x2 = 0

Combine like terms: 6x2 + 2x2 = 8x2
-9 + -3x + 8x2 = 0

Solving
-9 + -3x + 8x2 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
-1.125 + -0.375x + x2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + -0.375x + 1.125 + x2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + -0.375x + x2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + -0.375x + x2 = 0 + 1.125
-0.375x + x2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
-0.375x + x2 = 1.125

The x term is -0.375x.  Take half its coefficient (-0.1875).
Square it (0.03515625) and add it to both sides.

Add '0.03515625' to each side of the equation.
-0.375x + 0.03515625 + x2 = 1.125 + 0.03515625

Reorder the terms:
0.03515625 + -0.375x + x2 = 1.125 + 0.03515625

Combine like terms: 1.125 + 0.03515625 = 1.16015625
0.03515625 + -0.375x + x2 = 1.16015625

Factor a perfect square on the left side:
(x + -0.1875)(x + -0.1875) = 1.16015625

Calculate the square root of the right side: 1.077105496

Break this problem into two subproblems by setting 
(x + -0.1875) equal to 1.077105496 and -1.077105496.

Subproblem 1

x + -0.1875 = 1.077105496 Simplifying x + -0.1875 = 1.077105496 Reorder the terms: -0.1875 + x = 1.077105496 Solving -0.1875 + x = 1.077105496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + x = 1.077105496 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + x = 1.077105496 + 0.1875 x = 1.077105496 + 0.1875 Combine like terms: 1.077105496 + 0.1875 = 1.264605496 x = 1.264605496 Simplifying x = 1.264605496

Subproblem 2

x + -0.1875 = -1.077105496 Simplifying x + -0.1875 = -1.077105496 Reorder the terms: -0.1875 + x = -1.077105496 Solving -0.1875 + x = -1.077105496 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.1875' to each side of the equation. -0.1875 + 0.1875 + x = -1.077105496 + 0.1875 Combine like terms: -0.1875 + 0.1875 = 0.0000 0.0000 + x = -1.077105496 + 0.1875 x = -1.077105496 + 0.1875 Combine like terms: -1.077105496 + 0.1875 = -0.889605496 x = -0.889605496 Simplifying x = -0.889605496

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.264605496, -0.889605496}

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