0.6x*(x+10)=86

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Solution for 0.6x*(x+10)=86 equation:


Simplifying
0.6x(x + 10) = 86

Reorder the terms:
0.6x(10 + x) = 86
(10 * 0.6x + x * 0.6x) = 86
(6x + 0.6x2) = 86

Solving
6x + 0.6x2 = 86

Solving for variable 'x'.

Reorder the terms:
-86 + 6x + 0.6x2 = 86 + -86

Combine like terms: 86 + -86 = 0
-86 + 6x + 0.6x2 = 0

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

Divide each side by '0.6'.
-143.3333333 + 10x + x2 = 0

Move the constant term to the right:

Add '143.3333333' to each side of the equation.
-143.3333333 + 10x + 143.3333333 + x2 = 0 + 143.3333333

Reorder the terms:
-143.3333333 + 143.3333333 + 10x + x2 = 0 + 143.3333333

Combine like terms: -143.3333333 + 143.3333333 = 0.0000000
0.0000000 + 10x + x2 = 0 + 143.3333333
10x + x2 = 0 + 143.3333333

Combine like terms: 0 + 143.3333333 = 143.3333333
10x + x2 = 143.3333333

The x term is 10x.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10x + 25 + x2 = 143.3333333 + 25

Reorder the terms:
25 + 10x + x2 = 143.3333333 + 25

Combine like terms: 143.3333333 + 25 = 168.3333333
25 + 10x + x2 = 168.3333333

Factor a perfect square on the left side:
(x + 5)(x + 5) = 168.3333333

Calculate the square root of the right side: 12.974333636

Break this problem into two subproblems by setting 
(x + 5) equal to 12.974333636 and -12.974333636.

Subproblem 1

x + 5 = 12.974333636 Simplifying x + 5 = 12.974333636 Reorder the terms: 5 + x = 12.974333636 Solving 5 + x = 12.974333636 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 12.974333636 + -5 Combine like terms: 5 + -5 = 0 0 + x = 12.974333636 + -5 x = 12.974333636 + -5 Combine like terms: 12.974333636 + -5 = 7.974333636 x = 7.974333636 Simplifying x = 7.974333636

Subproblem 2

x + 5 = -12.974333636 Simplifying x + 5 = -12.974333636 Reorder the terms: 5 + x = -12.974333636 Solving 5 + x = -12.974333636 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -12.974333636 + -5 Combine like terms: 5 + -5 = 0 0 + x = -12.974333636 + -5 x = -12.974333636 + -5 Combine like terms: -12.974333636 + -5 = -17.974333636 x = -17.974333636 Simplifying x = -17.974333636

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.974333636, -17.974333636}

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