3x^2+5x-6=-2x^2+3x+7

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Solution for 3x^2+5x-6=-2x^2+3x+7 equation:


Simplifying
3x2 + 5x + -6 = -2x2 + 3x + 7

Reorder the terms:
-6 + 5x + 3x2 = -2x2 + 3x + 7

Reorder the terms:
-6 + 5x + 3x2 = 7 + 3x + -2x2

Solving
-6 + 5x + 3x2 = 7 + 3x + -2x2

Solving for variable 'x'.

Reorder the terms:
-6 + -7 + 5x + -3x + 3x2 + 2x2 = 7 + 3x + -2x2 + -7 + -3x + 2x2

Combine like terms: -6 + -7 = -13
-13 + 5x + -3x + 3x2 + 2x2 = 7 + 3x + -2x2 + -7 + -3x + 2x2

Combine like terms: 5x + -3x = 2x
-13 + 2x + 3x2 + 2x2 = 7 + 3x + -2x2 + -7 + -3x + 2x2

Combine like terms: 3x2 + 2x2 = 5x2
-13 + 2x + 5x2 = 7 + 3x + -2x2 + -7 + -3x + 2x2

Reorder the terms:
-13 + 2x + 5x2 = 7 + -7 + 3x + -3x + -2x2 + 2x2

Combine like terms: 7 + -7 = 0
-13 + 2x + 5x2 = 0 + 3x + -3x + -2x2 + 2x2
-13 + 2x + 5x2 = 3x + -3x + -2x2 + 2x2

Combine like terms: 3x + -3x = 0
-13 + 2x + 5x2 = 0 + -2x2 + 2x2
-13 + 2x + 5x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
-13 + 2x + 5x2 = 0

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

Divide each side by '5'.
-2.6 + 0.4x + x2 = 0

Move the constant term to the right:

Add '2.6' to each side of the equation.
-2.6 + 0.4x + 2.6 + x2 = 0 + 2.6

Reorder the terms:
-2.6 + 2.6 + 0.4x + x2 = 0 + 2.6

Combine like terms: -2.6 + 2.6 = 0.0
0.0 + 0.4x + x2 = 0 + 2.6
0.4x + x2 = 0 + 2.6

Combine like terms: 0 + 2.6 = 2.6
0.4x + x2 = 2.6

The x term is 0.4x.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4x + 0.04 + x2 = 2.6 + 0.04

Reorder the terms:
0.04 + 0.4x + x2 = 2.6 + 0.04

Combine like terms: 2.6 + 0.04 = 2.64
0.04 + 0.4x + x2 = 2.64

Factor a perfect square on the left side:
(x + 0.2)(x + 0.2) = 2.64

Calculate the square root of the right side: 1.624807681

Break this problem into two subproblems by setting 
(x + 0.2) equal to 1.624807681 and -1.624807681.

Subproblem 1

x + 0.2 = 1.624807681 Simplifying x + 0.2 = 1.624807681 Reorder the terms: 0.2 + x = 1.624807681 Solving 0.2 + x = 1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = 1.624807681 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = 1.624807681 + -0.2 x = 1.624807681 + -0.2 Combine like terms: 1.624807681 + -0.2 = 1.424807681 x = 1.424807681 Simplifying x = 1.424807681

Subproblem 2

x + 0.2 = -1.624807681 Simplifying x + 0.2 = -1.624807681 Reorder the terms: 0.2 + x = -1.624807681 Solving 0.2 + x = -1.624807681 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + x = -1.624807681 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + x = -1.624807681 + -0.2 x = -1.624807681 + -0.2 Combine like terms: -1.624807681 + -0.2 = -1.824807681 x = -1.824807681 Simplifying x = -1.824807681

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.424807681, -1.824807681}

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