2x^2+8-4x+3x-6x^2+7=

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Solution for 2x^2+8-4x+3x-6x^2+7= equation:


Simplifying
2x2 + 8 + -4x + 3x + -6x2 + 7 = 0

Reorder the terms:
8 + 7 + -4x + 3x + 2x2 + -6x2 = 0

Combine like terms: 8 + 7 = 15
15 + -4x + 3x + 2x2 + -6x2 = 0

Combine like terms: -4x + 3x = -1x
15 + -1x + 2x2 + -6x2 = 0

Combine like terms: 2x2 + -6x2 = -4x2
15 + -1x + -4x2 = 0

Solving
15 + -1x + -4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-3.75 + 0.25x + x2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + 0.25x + 3.75 + x2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + 0.25x + x2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + 0.25x + x2 = 0 + 3.75
0.25x + x2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
0.25x + x2 = 3.75

The x term is 0.25x.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25x + 0.015625 + x2 = 3.75 + 0.015625

Reorder the terms:
0.015625 + 0.25x + x2 = 3.75 + 0.015625

Combine like terms: 3.75 + 0.015625 = 3.765625
0.015625 + 0.25x + x2 = 3.765625

Factor a perfect square on the left side:
(x + 0.125)(x + 0.125) = 3.765625

Calculate the square root of the right side: 1.940521837

Break this problem into two subproblems by setting 
(x + 0.125) equal to 1.940521837 and -1.940521837.

Subproblem 1

x + 0.125 = 1.940521837 Simplifying x + 0.125 = 1.940521837 Reorder the terms: 0.125 + x = 1.940521837 Solving 0.125 + x = 1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = 1.940521837 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = 1.940521837 + -0.125 x = 1.940521837 + -0.125 Combine like terms: 1.940521837 + -0.125 = 1.815521837 x = 1.815521837 Simplifying x = 1.815521837

Subproblem 2

x + 0.125 = -1.940521837 Simplifying x + 0.125 = -1.940521837 Reorder the terms: 0.125 + x = -1.940521837 Solving 0.125 + x = -1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + x = -1.940521837 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + x = -1.940521837 + -0.125 x = -1.940521837 + -0.125 Combine like terms: -1.940521837 + -0.125 = -2.065521837 x = -2.065521837 Simplifying x = -2.065521837

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.815521837, -2.065521837}

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