-0.6x^2=3.6x+0.6

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Solution for -0.6x^2=3.6x+0.6 equation:


Simplifying
-0.6x2 = 3.6x + 0.6

Reorder the terms:
-0.6x2 = 0.6 + 3.6x

Solving
-0.6x2 = 0.6 + 3.6x

Solving for variable 'x'.

Reorder the terms:
-0.6 + -3.6x + -0.6x2 = 0.6 + 3.6x + -0.6 + -3.6x

Reorder the terms:
-0.6 + -3.6x + -0.6x2 = 0.6 + -0.6 + 3.6x + -3.6x

Combine like terms: 0.6 + -0.6 = 0.0
-0.6 + -3.6x + -0.6x2 = 0.0 + 3.6x + -3.6x
-0.6 + -3.6x + -0.6x2 = 3.6x + -3.6x

Combine like terms: 3.6x + -3.6x = 0.0
-0.6 + -3.6x + -0.6x2 = 0.0

Begin completing the square.  Divide all terms by
-0.6 the coefficient of the squared term: 

Divide each side by '-0.6'.
1 + 6x + x2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 6x + -1 + x2 = 0 + -1

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

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

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

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = -1 + 9

Reorder the terms:
9 + 6x + x2 = -1 + 9

Combine like terms: -1 + 9 = 8
9 + 6x + x2 = 8

Factor a perfect square on the left side:
(x + 3)(x + 3) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(x + 3) equal to 2.828427125 and -2.828427125.

Subproblem 1

x + 3 = 2.828427125 Simplifying x + 3 = 2.828427125 Reorder the terms: 3 + x = 2.828427125 Solving 3 + x = 2.828427125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + x = 2.828427125 + -3 x = 2.828427125 + -3 Combine like terms: 2.828427125 + -3 = -0.171572875 x = -0.171572875 Simplifying x = -0.171572875

Subproblem 2

x + 3 = -2.828427125 Simplifying x + 3 = -2.828427125 Reorder the terms: 3 + x = -2.828427125 Solving 3 + x = -2.828427125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = -2.828427125 + -3 Combine like terms: 3 + -3 = 0 0 + x = -2.828427125 + -3 x = -2.828427125 + -3 Combine like terms: -2.828427125 + -3 = -5.828427125 x = -5.828427125 Simplifying x = -5.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.171572875, -5.828427125}

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