5x(x+6)=3

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Solution for 5x(x+6)=3 equation:


Simplifying
5x(x + 6) = 3

Reorder the terms:
5x(6 + x) = 3
(6 * 5x + x * 5x) = 3
(30x + 5x2) = 3

Solving
30x + 5x2 = 3

Solving for variable 'x'.

Reorder the terms:
-3 + 30x + 5x2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 30x + 5x2 = 0

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

Divide each side by '5'.
-0.6 + 6x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + 6x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + 6x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + 6x + x2 = 0 + 0.6
6x + x2 = 0 + 0.6

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

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 = 0.6 + 9

Reorder the terms:
9 + 6x + x2 = 0.6 + 9

Combine like terms: 0.6 + 9 = 9.6
9 + 6x + x2 = 9.6

Factor a perfect square on the left side:
(x + 3)(x + 3) = 9.6

Calculate the square root of the right side: 3.098386677

Break this problem into two subproblems by setting 
(x + 3) equal to 3.098386677 and -3.098386677.

Subproblem 1

x + 3 = 3.098386677 Simplifying x + 3 = 3.098386677 Reorder the terms: 3 + x = 3.098386677 Solving 3 + x = 3.098386677 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 = 3.098386677 + -3 Combine like terms: 3 + -3 = 0 0 + x = 3.098386677 + -3 x = 3.098386677 + -3 Combine like terms: 3.098386677 + -3 = 0.098386677 x = 0.098386677 Simplifying x = 0.098386677

Subproblem 2

x + 3 = -3.098386677 Simplifying x + 3 = -3.098386677 Reorder the terms: 3 + x = -3.098386677 Solving 3 + x = -3.098386677 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 = -3.098386677 + -3 Combine like terms: 3 + -3 = 0 0 + x = -3.098386677 + -3 x = -3.098386677 + -3 Combine like terms: -3.098386677 + -3 = -6.098386677 x = -6.098386677 Simplifying x = -6.098386677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.098386677, -6.098386677}

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