-3x(x+3)=-3(x+1)-5

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Solution for -3x(x+3)=-3(x+1)-5 equation:


Simplifying
-3x(x + 3) = -3(x + 1) + -5

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

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

Reorder the terms:
-9x + -3x2 = -3 + -5 + -3x

Combine like terms: -3 + -5 = -8
-9x + -3x2 = -8 + -3x

Solving
-9x + -3x2 = -8 + -3x

Solving for variable 'x'.

Reorder the terms:
8 + -9x + 3x + -3x2 = -8 + -3x + 8 + 3x

Combine like terms: -9x + 3x = -6x
8 + -6x + -3x2 = -8 + -3x + 8 + 3x

Reorder the terms:
8 + -6x + -3x2 = -8 + 8 + -3x + 3x

Combine like terms: -8 + 8 = 0
8 + -6x + -3x2 = 0 + -3x + 3x
8 + -6x + -3x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
8 + -6x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-2.666666667 + 2x + x2 = 0

Move the constant term to the right:

Add '2.666666667' to each side of the equation.
-2.666666667 + 2x + 2.666666667 + x2 = 0 + 2.666666667

Reorder the terms:
-2.666666667 + 2.666666667 + 2x + x2 = 0 + 2.666666667

Combine like terms: -2.666666667 + 2.666666667 = 0.000000000
0.000000000 + 2x + x2 = 0 + 2.666666667
2x + x2 = 0 + 2.666666667

Combine like terms: 0 + 2.666666667 = 2.666666667
2x + x2 = 2.666666667

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 2.666666667 + 1

Reorder the terms:
1 + 2x + x2 = 2.666666667 + 1

Combine like terms: 2.666666667 + 1 = 3.666666667
1 + 2x + x2 = 3.666666667

Factor a perfect square on the left side:
(x + 1)(x + 1) = 3.666666667

Calculate the square root of the right side: 1.914854216

Break this problem into two subproblems by setting 
(x + 1) equal to 1.914854216 and -1.914854216.

Subproblem 1

x + 1 = 1.914854216 Simplifying x + 1 = 1.914854216 Reorder the terms: 1 + x = 1.914854216 Solving 1 + x = 1.914854216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.914854216 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.914854216 + -1 x = 1.914854216 + -1 Combine like terms: 1.914854216 + -1 = 0.914854216 x = 0.914854216 Simplifying x = 0.914854216

Subproblem 2

x + 1 = -1.914854216 Simplifying x + 1 = -1.914854216 Reorder the terms: 1 + x = -1.914854216 Solving 1 + x = -1.914854216 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.914854216 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.914854216 + -1 x = -1.914854216 + -1 Combine like terms: -1.914854216 + -1 = -2.914854216 x = -2.914854216 Simplifying x = -2.914854216

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.914854216, -2.914854216}

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