5x(3x+3)=4x+10

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Solution for 5x(3x+3)=4x+10 equation:


Simplifying
5x(3x + 3) = 4x + 10

Reorder the terms:
5x(3 + 3x) = 4x + 10
(3 * 5x + 3x * 5x) = 4x + 10
(15x + 15x2) = 4x + 10

Reorder the terms:
15x + 15x2 = 10 + 4x

Solving
15x + 15x2 = 10 + 4x

Solving for variable 'x'.

Reorder the terms:
-10 + 15x + -4x + 15x2 = 10 + 4x + -10 + -4x

Combine like terms: 15x + -4x = 11x
-10 + 11x + 15x2 = 10 + 4x + -10 + -4x

Reorder the terms:
-10 + 11x + 15x2 = 10 + -10 + 4x + -4x

Combine like terms: 10 + -10 = 0
-10 + 11x + 15x2 = 0 + 4x + -4x
-10 + 11x + 15x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-10 + 11x + 15x2 = 0

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

Divide each side by '15'.
-0.6666666667 + 0.7333333333x + x2 = 0

Move the constant term to the right:

Add '0.6666666667' to each side of the equation.
-0.6666666667 + 0.7333333333x + 0.6666666667 + x2 = 0 + 0.6666666667

Reorder the terms:
-0.6666666667 + 0.6666666667 + 0.7333333333x + x2 = 0 + 0.6666666667

Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000
0.0000000000 + 0.7333333333x + x2 = 0 + 0.6666666667
0.7333333333x + x2 = 0 + 0.6666666667

Combine like terms: 0 + 0.6666666667 = 0.6666666667
0.7333333333x + x2 = 0.6666666667

The x term is 0.7333333333x.  Take half its coefficient (0.3666666667).
Square it (0.1344444445) and add it to both sides.

Add '0.1344444445' to each side of the equation.
0.7333333333x + 0.1344444445 + x2 = 0.6666666667 + 0.1344444445

Reorder the terms:
0.1344444445 + 0.7333333333x + x2 = 0.6666666667 + 0.1344444445

Combine like terms: 0.6666666667 + 0.1344444445 = 0.8011111112
0.1344444445 + 0.7333333333x + x2 = 0.8011111112

Factor a perfect square on the left side:
(x + 0.3666666667)(x + 0.3666666667) = 0.8011111112

Calculate the square root of the right side: 0.895048106

Break this problem into two subproblems by setting 
(x + 0.3666666667) equal to 0.895048106 and -0.895048106.

Subproblem 1

x + 0.3666666667 = 0.895048106 Simplifying x + 0.3666666667 = 0.895048106 Reorder the terms: 0.3666666667 + x = 0.895048106 Solving 0.3666666667 + x = 0.895048106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3666666667' to each side of the equation. 0.3666666667 + -0.3666666667 + x = 0.895048106 + -0.3666666667 Combine like terms: 0.3666666667 + -0.3666666667 = 0.0000000000 0.0000000000 + x = 0.895048106 + -0.3666666667 x = 0.895048106 + -0.3666666667 Combine like terms: 0.895048106 + -0.3666666667 = 0.5283814393 x = 0.5283814393 Simplifying x = 0.5283814393

Subproblem 2

x + 0.3666666667 = -0.895048106 Simplifying x + 0.3666666667 = -0.895048106 Reorder the terms: 0.3666666667 + x = -0.895048106 Solving 0.3666666667 + x = -0.895048106 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3666666667' to each side of the equation. 0.3666666667 + -0.3666666667 + x = -0.895048106 + -0.3666666667 Combine like terms: 0.3666666667 + -0.3666666667 = 0.0000000000 0.0000000000 + x = -0.895048106 + -0.3666666667 x = -0.895048106 + -0.3666666667 Combine like terms: -0.895048106 + -0.3666666667 = -1.2617147727 x = -1.2617147727 Simplifying x = -1.2617147727

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5283814393, -1.2617147727}

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