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

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


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

Reorder the terms:
5x(-2 + -2x) = x + (3x + -5)
(-2 * 5x + -2x * 5x) = x + (3x + -5)
(-10x + -10x2) = x + (3x + -5)

Reorder the terms:
-10x + -10x2 = x + (-5 + 3x)

Remove parenthesis around (-5 + 3x)
-10x + -10x2 = x + -5 + 3x

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

Combine like terms: x + 3x = 4x
-10x + -10x2 = -5 + 4x

Solving
-10x + -10x2 = -5 + 4x

Solving for variable 'x'.

Reorder the terms:
5 + -10x + -4x + -10x2 = -5 + 4x + 5 + -4x

Combine like terms: -10x + -4x = -14x
5 + -14x + -10x2 = -5 + 4x + 5 + -4x

Reorder the terms:
5 + -14x + -10x2 = -5 + 5 + 4x + -4x

Combine like terms: -5 + 5 = 0
5 + -14x + -10x2 = 0 + 4x + -4x
5 + -14x + -10x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
5 + -14x + -10x2 = 0

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

Divide each side by '-10'.
-0.5 + 1.4x + x2 = 0.0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + 1.4x + 0.5 + x2 = 0.0 + 0.5

Reorder the terms:
-0.5 + 0.5 + 1.4x + x2 = 0.0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + 1.4x + x2 = 0.0 + 0.5
1.4x + x2 = 0.0 + 0.5

Combine like terms: 0.0 + 0.5 = 0.5
1.4x + x2 = 0.5

The x term is 1.4x.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4x + 0.49 + x2 = 0.5 + 0.49

Reorder the terms:
0.49 + 1.4x + x2 = 0.5 + 0.49

Combine like terms: 0.5 + 0.49 = 0.99
0.49 + 1.4x + x2 = 0.99

Factor a perfect square on the left side:
(x + 0.7)(x + 0.7) = 0.99

Calculate the square root of the right side: 0.994987437

Break this problem into two subproblems by setting 
(x + 0.7) equal to 0.994987437 and -0.994987437.

Subproblem 1

x + 0.7 = 0.994987437 Simplifying x + 0.7 = 0.994987437 Reorder the terms: 0.7 + x = 0.994987437 Solving 0.7 + x = 0.994987437 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = 0.994987437 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = 0.994987437 + -0.7 x = 0.994987437 + -0.7 Combine like terms: 0.994987437 + -0.7 = 0.294987437 x = 0.294987437 Simplifying x = 0.294987437

Subproblem 2

x + 0.7 = -0.994987437 Simplifying x + 0.7 = -0.994987437 Reorder the terms: 0.7 + x = -0.994987437 Solving 0.7 + x = -0.994987437 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = -0.994987437 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = -0.994987437 + -0.7 x = -0.994987437 + -0.7 Combine like terms: -0.994987437 + -0.7 = -1.694987437 x = -1.694987437 Simplifying x = -1.694987437

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.294987437, -1.694987437}

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