-3x+5=x^2+x-6

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Solution for -3x+5=x^2+x-6 equation:


Simplifying
-3x + 5 = x2 + x + -6

Reorder the terms:
5 + -3x = x2 + x + -6

Reorder the terms:
5 + -3x = -6 + x + x2

Solving
5 + -3x = -6 + x + x2

Solving for variable 'x'.

Reorder the terms:
5 + 6 + -3x + -1x + -1x2 = -6 + x + x2 + 6 + -1x + -1x2

Combine like terms: 5 + 6 = 11
11 + -3x + -1x + -1x2 = -6 + x + x2 + 6 + -1x + -1x2

Combine like terms: -3x + -1x = -4x
11 + -4x + -1x2 = -6 + x + x2 + 6 + -1x + -1x2

Reorder the terms:
11 + -4x + -1x2 = -6 + 6 + x + -1x + x2 + -1x2

Combine like terms: -6 + 6 = 0
11 + -4x + -1x2 = 0 + x + -1x + x2 + -1x2
11 + -4x + -1x2 = x + -1x + x2 + -1x2

Combine like terms: x + -1x = 0
11 + -4x + -1x2 = 0 + x2 + -1x2
11 + -4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
11 + -4x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-11 + 4x + x2 = 0

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 4x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + 4x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 4x + x2 = 0 + 11
4x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
4x + x2 = 11

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 11 + 4

Reorder the terms:
4 + 4x + x2 = 11 + 4

Combine like terms: 11 + 4 = 15
4 + 4x + x2 = 15

Factor a perfect square on the left side:
(x + 2)(x + 2) = 15

Calculate the square root of the right side: 3.872983346

Break this problem into two subproblems by setting 
(x + 2) equal to 3.872983346 and -3.872983346.

Subproblem 1

x + 2 = 3.872983346 Simplifying x + 2 = 3.872983346 Reorder the terms: 2 + x = 3.872983346 Solving 2 + x = 3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 3.872983346 + -2 Combine like terms: 2 + -2 = 0 0 + x = 3.872983346 + -2 x = 3.872983346 + -2 Combine like terms: 3.872983346 + -2 = 1.872983346 x = 1.872983346 Simplifying x = 1.872983346

Subproblem 2

x + 2 = -3.872983346 Simplifying x + 2 = -3.872983346 Reorder the terms: 2 + x = -3.872983346 Solving 2 + x = -3.872983346 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -3.872983346 + -2 Combine like terms: 2 + -2 = 0 0 + x = -3.872983346 + -2 x = -3.872983346 + -2 Combine like terms: -3.872983346 + -2 = -5.872983346 x = -5.872983346 Simplifying x = -5.872983346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.872983346, -5.872983346}

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