(x+3)(5x)+(3x-2-58)=

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Solution for (x+3)(5x)+(3x-2-58)= equation:


Simplifying
(x + 3)(5x) + (3x + -2 + -58) = 0

Reorder the terms:
(3 + x)(5x) + (3x + -2 + -58) = 0

Remove parenthesis around (5x)
(3 + x) * 5x + (3x + -2 + -58) = 0

Reorder the terms for easier multiplication:
5x(3 + x) + (3x + -2 + -58) = 0
(3 * 5x + x * 5x) + (3x + -2 + -58) = 0
(15x + 5x2) + (3x + -2 + -58) = 0

Reorder the terms:
15x + 5x2 + (-2 + -58 + 3x) = 0

Combine like terms: -2 + -58 = -60
15x + 5x2 + (-60 + 3x) = 0

Remove parenthesis around (-60 + 3x)
15x + 5x2 + -60 + 3x = 0

Reorder the terms:
-60 + 15x + 3x + 5x2 = 0

Combine like terms: 15x + 3x = 18x
-60 + 18x + 5x2 = 0

Solving
-60 + 18x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
-12 + 3.6x + x2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + 3.6x + 12 + x2 = 0 + 12

Reorder the terms:
-12 + 12 + 3.6x + x2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 3.6x + x2 = 0 + 12
3.6x + x2 = 0 + 12

Combine like terms: 0 + 12 = 12
3.6x + x2 = 12

The x term is 3.6x.  Take half its coefficient (1.8).
Square it (3.24) and add it to both sides.

Add '3.24' to each side of the equation.
3.6x + 3.24 + x2 = 12 + 3.24

Reorder the terms:
3.24 + 3.6x + x2 = 12 + 3.24

Combine like terms: 12 + 3.24 = 15.24
3.24 + 3.6x + x2 = 15.24

Factor a perfect square on the left side:
(x + 1.8)(x + 1.8) = 15.24

Calculate the square root of the right side: 3.903844259

Break this problem into two subproblems by setting 
(x + 1.8) equal to 3.903844259 and -3.903844259.

Subproblem 1

x + 1.8 = 3.903844259 Simplifying x + 1.8 = 3.903844259 Reorder the terms: 1.8 + x = 3.903844259 Solving 1.8 + x = 3.903844259 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + x = 3.903844259 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + x = 3.903844259 + -1.8 x = 3.903844259 + -1.8 Combine like terms: 3.903844259 + -1.8 = 2.103844259 x = 2.103844259 Simplifying x = 2.103844259

Subproblem 2

x + 1.8 = -3.903844259 Simplifying x + 1.8 = -3.903844259 Reorder the terms: 1.8 + x = -3.903844259 Solving 1.8 + x = -3.903844259 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.8' to each side of the equation. 1.8 + -1.8 + x = -3.903844259 + -1.8 Combine like terms: 1.8 + -1.8 = 0.0 0.0 + x = -3.903844259 + -1.8 x = -3.903844259 + -1.8 Combine like terms: -3.903844259 + -1.8 = -5.703844259 x = -5.703844259 Simplifying x = -5.703844259

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.103844259, -5.703844259}

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