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

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


Simplifying
(-6x + 2x2) + -1(x2 + x + -3) = 0

Remove parenthesis around (-6x + 2x2)
-6x + 2x2 + -1(x2 + x + -3) = 0

Reorder the terms:
-6x + 2x2 + -1(-3 + x + x2) = 0
-6x + 2x2 + (-3 * -1 + x * -1 + x2 * -1) = 0
-6x + 2x2 + (3 + -1x + -1x2) = 0

Reorder the terms:
3 + -6x + -1x + 2x2 + -1x2 = 0

Combine like terms: -6x + -1x = -7x
3 + -7x + 2x2 + -1x2 = 0

Combine like terms: 2x2 + -1x2 = 1x2
3 + -7x + 1x2 = 0

Solving
3 + -7x + 1x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -7x + -3 + x2 = 0 + -3

Reorder the terms:
3 + -3 + -7x + x2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -7x + x2 = 0 + -3
-7x + x2 = 0 + -3

Combine like terms: 0 + -3 = -3
-7x + x2 = -3

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -3 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -3 + 12.25

Combine like terms: -3 + 12.25 = 9.25
12.25 + -7x + x2 = 9.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(x + -3.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

x + -3.5 = 3.041381265 Simplifying x + -3.5 = 3.041381265 Reorder the terms: -3.5 + x = 3.041381265 Solving -3.5 + x = 3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 3.041381265 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 3.041381265 + 3.5 x = 3.041381265 + 3.5 Combine like terms: 3.041381265 + 3.5 = 6.541381265 x = 6.541381265 Simplifying x = 6.541381265

Subproblem 2

x + -3.5 = -3.041381265 Simplifying x + -3.5 = -3.041381265 Reorder the terms: -3.5 + x = -3.041381265 Solving -3.5 + x = -3.041381265 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -3.041381265 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -3.041381265 + 3.5 x = -3.041381265 + 3.5 Combine like terms: -3.041381265 + 3.5 = 0.458618735 x = 0.458618735 Simplifying x = 0.458618735

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.541381265, 0.458618735}

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