(-6x^2+5x-2)-(7x^2-5x-8)=

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Solution for (-6x^2+5x-2)-(7x^2-5x-8)= equation:


Simplifying
(-6x2 + 5x + -2) + -1(7x2 + -5x + -8) = 0

Reorder the terms:
(-2 + 5x + -6x2) + -1(7x2 + -5x + -8) = 0

Remove parenthesis around (-2 + 5x + -6x2)
-2 + 5x + -6x2 + -1(7x2 + -5x + -8) = 0

Reorder the terms:
-2 + 5x + -6x2 + -1(-8 + -5x + 7x2) = 0
-2 + 5x + -6x2 + (-8 * -1 + -5x * -1 + 7x2 * -1) = 0
-2 + 5x + -6x2 + (8 + 5x + -7x2) = 0

Reorder the terms:
-2 + 8 + 5x + 5x + -6x2 + -7x2 = 0

Combine like terms: -2 + 8 = 6
6 + 5x + 5x + -6x2 + -7x2 = 0

Combine like terms: 5x + 5x = 10x
6 + 10x + -6x2 + -7x2 = 0

Combine like terms: -6x2 + -7x2 = -13x2
6 + 10x + -13x2 = 0

Solving
6 + 10x + -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'.
-0.4615384615 + -0.7692307692x + x2 = 0

Move the constant term to the right:

Add '0.4615384615' to each side of the equation.
-0.4615384615 + -0.7692307692x + 0.4615384615 + x2 = 0 + 0.4615384615

Reorder the terms:
-0.4615384615 + 0.4615384615 + -0.7692307692x + x2 = 0 + 0.4615384615

Combine like terms: -0.4615384615 + 0.4615384615 = 0.0000000000
0.0000000000 + -0.7692307692x + x2 = 0 + 0.4615384615
-0.7692307692x + x2 = 0 + 0.4615384615

Combine like terms: 0 + 0.4615384615 = 0.4615384615
-0.7692307692x + x2 = 0.4615384615

The x term is -0.7692307692x.  Take half its coefficient (-0.3846153846).
Square it (0.1479289941) and add it to both sides.

Add '0.1479289941' to each side of the equation.
-0.7692307692x + 0.1479289941 + x2 = 0.4615384615 + 0.1479289941

Reorder the terms:
0.1479289941 + -0.7692307692x + x2 = 0.4615384615 + 0.1479289941

Combine like terms: 0.4615384615 + 0.1479289941 = 0.6094674556
0.1479289941 + -0.7692307692x + x2 = 0.6094674556

Factor a perfect square on the left side:
(x + -0.3846153846)(x + -0.3846153846) = 0.6094674556

Calculate the square root of the right side: 0.780683967

Break this problem into two subproblems by setting 
(x + -0.3846153846) equal to 0.780683967 and -0.780683967.

Subproblem 1

x + -0.3846153846 = 0.780683967 Simplifying x + -0.3846153846 = 0.780683967 Reorder the terms: -0.3846153846 + x = 0.780683967 Solving -0.3846153846 + x = 0.780683967 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3846153846' to each side of the equation. -0.3846153846 + 0.3846153846 + x = 0.780683967 + 0.3846153846 Combine like terms: -0.3846153846 + 0.3846153846 = 0.0000000000 0.0000000000 + x = 0.780683967 + 0.3846153846 x = 0.780683967 + 0.3846153846 Combine like terms: 0.780683967 + 0.3846153846 = 1.1652993516 x = 1.1652993516 Simplifying x = 1.1652993516

Subproblem 2

x + -0.3846153846 = -0.780683967 Simplifying x + -0.3846153846 = -0.780683967 Reorder the terms: -0.3846153846 + x = -0.780683967 Solving -0.3846153846 + x = -0.780683967 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3846153846' to each side of the equation. -0.3846153846 + 0.3846153846 + x = -0.780683967 + 0.3846153846 Combine like terms: -0.3846153846 + 0.3846153846 = 0.0000000000 0.0000000000 + x = -0.780683967 + 0.3846153846 x = -0.780683967 + 0.3846153846 Combine like terms: -0.780683967 + 0.3846153846 = -0.3960685824 x = -0.3960685824 Simplifying x = -0.3960685824

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1652993516, -0.3960685824}

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