10x^2-20-8=5x^2-6x

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Solution for 10x^2-20-8=5x^2-6x equation:


Simplifying
10x2 + -20 + -8 = 5x2 + -6x

Reorder the terms:
-20 + -8 + 10x2 = 5x2 + -6x

Combine like terms: -20 + -8 = -28
-28 + 10x2 = 5x2 + -6x

Reorder the terms:
-28 + 10x2 = -6x + 5x2

Solving
-28 + 10x2 = -6x + 5x2

Solving for variable 'x'.

Reorder the terms:
-28 + 6x + 10x2 + -5x2 = -6x + 5x2 + 6x + -5x2

Combine like terms: 10x2 + -5x2 = 5x2
-28 + 6x + 5x2 = -6x + 5x2 + 6x + -5x2

Reorder the terms:
-28 + 6x + 5x2 = -6x + 6x + 5x2 + -5x2

Combine like terms: -6x + 6x = 0
-28 + 6x + 5x2 = 0 + 5x2 + -5x2
-28 + 6x + 5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
-28 + 6x + 5x2 = 0

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

Divide each side by '5'.
-5.6 + 1.2x + x2 = 0

Move the constant term to the right:

Add '5.6' to each side of the equation.
-5.6 + 1.2x + 5.6 + x2 = 0 + 5.6

Reorder the terms:
-5.6 + 5.6 + 1.2x + x2 = 0 + 5.6

Combine like terms: -5.6 + 5.6 = 0.0
0.0 + 1.2x + x2 = 0 + 5.6
1.2x + x2 = 0 + 5.6

Combine like terms: 0 + 5.6 = 5.6
1.2x + x2 = 5.6

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 5.6 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 5.6 + 0.36

Combine like terms: 5.6 + 0.36 = 5.96
0.36 + 1.2x + x2 = 5.96

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 5.96

Calculate the square root of the right side: 2.441311123

Break this problem into two subproblems by setting 
(x + 0.6) equal to 2.441311123 and -2.441311123.

Subproblem 1

x + 0.6 = 2.441311123 Simplifying x + 0.6 = 2.441311123 Reorder the terms: 0.6 + x = 2.441311123 Solving 0.6 + x = 2.441311123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 2.441311123 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 2.441311123 + -0.6 x = 2.441311123 + -0.6 Combine like terms: 2.441311123 + -0.6 = 1.841311123 x = 1.841311123 Simplifying x = 1.841311123

Subproblem 2

x + 0.6 = -2.441311123 Simplifying x + 0.6 = -2.441311123 Reorder the terms: 0.6 + x = -2.441311123 Solving 0.6 + x = -2.441311123 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -2.441311123 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -2.441311123 + -0.6 x = -2.441311123 + -0.6 Combine like terms: -2.441311123 + -0.6 = -3.041311123 x = -3.041311123 Simplifying x = -3.041311123

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.841311123, -3.041311123}

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