10x(x+3)-(-9-4)=x-5+3

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Solution for 10x(x+3)-(-9-4)=x-5+3 equation:


Simplifying
10x(x + 3) + -1(-9 + -4) = x + -5 + 3

Reorder the terms:
10x(3 + x) + -1(-9 + -4) = x + -5 + 3
(3 * 10x + x * 10x) + -1(-9 + -4) = x + -5 + 3
(30x + 10x2) + -1(-9 + -4) = x + -5 + 3

Combine like terms: -9 + -4 = -13
30x + 10x2 + -1(-13) = x + -5 + 3

Multiply -1 * -13
30x + 10x2 + 13 = x + -5 + 3

Reorder the terms:
13 + 30x + 10x2 = x + -5 + 3

Reorder the terms:
13 + 30x + 10x2 = -5 + 3 + x

Combine like terms: -5 + 3 = -2
13 + 30x + 10x2 = -2 + x

Solving
13 + 30x + 10x2 = -2 + x

Solving for variable 'x'.

Reorder the terms:
13 + 2 + 30x + -1x + 10x2 = -2 + x + 2 + -1x

Combine like terms: 13 + 2 = 15
15 + 30x + -1x + 10x2 = -2 + x + 2 + -1x

Combine like terms: 30x + -1x = 29x
15 + 29x + 10x2 = -2 + x + 2 + -1x

Reorder the terms:
15 + 29x + 10x2 = -2 + 2 + x + -1x

Combine like terms: -2 + 2 = 0
15 + 29x + 10x2 = 0 + x + -1x
15 + 29x + 10x2 = x + -1x

Combine like terms: x + -1x = 0
15 + 29x + 10x2 = 0

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

Divide each side by '10'.
1.5 + 2.9x + x2 = 0

Move the constant term to the right:

Add '-1.5' to each side of the equation.
1.5 + 2.9x + -1.5 + x2 = 0 + -1.5

Reorder the terms:
1.5 + -1.5 + 2.9x + x2 = 0 + -1.5

Combine like terms: 1.5 + -1.5 = 0.0
0.0 + 2.9x + x2 = 0 + -1.5
2.9x + x2 = 0 + -1.5

Combine like terms: 0 + -1.5 = -1.5
2.9x + x2 = -1.5

The x term is 2.9x.  Take half its coefficient (1.45).
Square it (2.1025) and add it to both sides.

Add '2.1025' to each side of the equation.
2.9x + 2.1025 + x2 = -1.5 + 2.1025

Reorder the terms:
2.1025 + 2.9x + x2 = -1.5 + 2.1025

Combine like terms: -1.5 + 2.1025 = 0.6025
2.1025 + 2.9x + x2 = 0.6025

Factor a perfect square on the left side:
(x + 1.45)(x + 1.45) = 0.6025

Calculate the square root of the right side: 0.776208735

Break this problem into two subproblems by setting 
(x + 1.45) equal to 0.776208735 and -0.776208735.

Subproblem 1

x + 1.45 = 0.776208735 Simplifying x + 1.45 = 0.776208735 Reorder the terms: 1.45 + x = 0.776208735 Solving 1.45 + x = 0.776208735 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.45' to each side of the equation. 1.45 + -1.45 + x = 0.776208735 + -1.45 Combine like terms: 1.45 + -1.45 = 0.00 0.00 + x = 0.776208735 + -1.45 x = 0.776208735 + -1.45 Combine like terms: 0.776208735 + -1.45 = -0.673791265 x = -0.673791265 Simplifying x = -0.673791265

Subproblem 2

x + 1.45 = -0.776208735 Simplifying x + 1.45 = -0.776208735 Reorder the terms: 1.45 + x = -0.776208735 Solving 1.45 + x = -0.776208735 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.45' to each side of the equation. 1.45 + -1.45 + x = -0.776208735 + -1.45 Combine like terms: 1.45 + -1.45 = 0.00 0.00 + x = -0.776208735 + -1.45 x = -0.776208735 + -1.45 Combine like terms: -0.776208735 + -1.45 = -2.226208735 x = -2.226208735 Simplifying x = -2.226208735

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.673791265, -2.226208735}

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