(x^2+4x+3)-(3x^2-6x+4)=

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Solution for (x^2+4x+3)-(3x^2-6x+4)= equation:


Simplifying
(x2 + 4x + 3) + -1(3x2 + -6x + 4) = 0

Reorder the terms:
(3 + 4x + x2) + -1(3x2 + -6x + 4) = 0

Remove parenthesis around (3 + 4x + x2)
3 + 4x + x2 + -1(3x2 + -6x + 4) = 0

Reorder the terms:
3 + 4x + x2 + -1(4 + -6x + 3x2) = 0
3 + 4x + x2 + (4 * -1 + -6x * -1 + 3x2 * -1) = 0
3 + 4x + x2 + (-4 + 6x + -3x2) = 0

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

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

Combine like terms: 4x + 6x = 10x
-1 + 10x + x2 + -3x2 = 0

Combine like terms: x2 + -3x2 = -2x2
-1 + 10x + -2x2 = 0

Solving
-1 + 10x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
0.5 + -5x + x2 = 0

Move the constant term to the right:

Add '-0.5' to each side of the equation.
0.5 + -5x + -0.5 + x2 = 0 + -0.5

Reorder the terms:
0.5 + -0.5 + -5x + x2 = 0 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -5x + x2 = 0 + -0.5
-5x + x2 = 0 + -0.5

Combine like terms: 0 + -0.5 = -0.5
-5x + x2 = -0.5

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = -0.5 + 6.25

Reorder the terms:
6.25 + -5x + x2 = -0.5 + 6.25

Combine like terms: -0.5 + 6.25 = 5.75
6.25 + -5x + x2 = 5.75

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 5.75

Calculate the square root of the right side: 2.397915762

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.397915762 and -2.397915762.

Subproblem 1

x + -2.5 = 2.397915762 Simplifying x + -2.5 = 2.397915762 Reorder the terms: -2.5 + x = 2.397915762 Solving -2.5 + x = 2.397915762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.397915762 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.397915762 + 2.5 x = 2.397915762 + 2.5 Combine like terms: 2.397915762 + 2.5 = 4.897915762 x = 4.897915762 Simplifying x = 4.897915762

Subproblem 2

x + -2.5 = -2.397915762 Simplifying x + -2.5 = -2.397915762 Reorder the terms: -2.5 + x = -2.397915762 Solving -2.5 + x = -2.397915762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.397915762 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.397915762 + 2.5 x = -2.397915762 + 2.5 Combine like terms: -2.397915762 + 2.5 = 0.102084238 x = 0.102084238 Simplifying x = 0.102084238

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.897915762, 0.102084238}

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