3(4x+1)+2x(1-5x)=2+x

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Solution for 3(4x+1)+2x(1-5x)=2+x equation:


Simplifying
3(4x + 1) + 2x(1 + -5x) = 2 + x

Reorder the terms:
3(1 + 4x) + 2x(1 + -5x) = 2 + x
(1 * 3 + 4x * 3) + 2x(1 + -5x) = 2 + x
(3 + 12x) + 2x(1 + -5x) = 2 + x
3 + 12x + (1 * 2x + -5x * 2x) = 2 + x
3 + 12x + (2x + -10x2) = 2 + x

Combine like terms: 12x + 2x = 14x
3 + 14x + -10x2 = 2 + x

Solving
3 + 14x + -10x2 = 2 + x

Solving for variable 'x'.

Reorder the terms:
3 + -2 + 14x + -1x + -10x2 = 2 + x + -2 + -1x

Combine like terms: 3 + -2 = 1
1 + 14x + -1x + -10x2 = 2 + x + -2 + -1x

Combine like terms: 14x + -1x = 13x
1 + 13x + -10x2 = 2 + x + -2 + -1x

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

Combine like terms: 2 + -2 = 0
1 + 13x + -10x2 = 0 + x + -1x
1 + 13x + -10x2 = x + -1x

Combine like terms: x + -1x = 0
1 + 13x + -10x2 = 0

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

Divide each side by '-10'.
-0.1 + -1.3x + x2 = 0.0

Move the constant term to the right:

Add '0.1' to each side of the equation.
-0.1 + -1.3x + 0.1 + x2 = 0.0 + 0.1

Reorder the terms:
-0.1 + 0.1 + -1.3x + x2 = 0.0 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + -1.3x + x2 = 0.0 + 0.1
-1.3x + x2 = 0.0 + 0.1

Combine like terms: 0.0 + 0.1 = 0.1
-1.3x + x2 = 0.1

The x term is -1.3x.  Take half its coefficient (-0.65).
Square it (0.4225) and add it to both sides.

Add '0.4225' to each side of the equation.
-1.3x + 0.4225 + x2 = 0.1 + 0.4225

Reorder the terms:
0.4225 + -1.3x + x2 = 0.1 + 0.4225

Combine like terms: 0.1 + 0.4225 = 0.5225
0.4225 + -1.3x + x2 = 0.5225

Factor a perfect square on the left side:
(x + -0.65)(x + -0.65) = 0.5225

Calculate the square root of the right side: 0.722841615

Break this problem into two subproblems by setting 
(x + -0.65) equal to 0.722841615 and -0.722841615.

Subproblem 1

x + -0.65 = 0.722841615 Simplifying x + -0.65 = 0.722841615 Reorder the terms: -0.65 + x = 0.722841615 Solving -0.65 + x = 0.722841615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = 0.722841615 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = 0.722841615 + 0.65 x = 0.722841615 + 0.65 Combine like terms: 0.722841615 + 0.65 = 1.372841615 x = 1.372841615 Simplifying x = 1.372841615

Subproblem 2

x + -0.65 = -0.722841615 Simplifying x + -0.65 = -0.722841615 Reorder the terms: -0.65 + x = -0.722841615 Solving -0.65 + x = -0.722841615 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.65' to each side of the equation. -0.65 + 0.65 + x = -0.722841615 + 0.65 Combine like terms: -0.65 + 0.65 = 0.00 0.00 + x = -0.722841615 + 0.65 x = -0.722841615 + 0.65 Combine like terms: -0.722841615 + 0.65 = -0.072841615 x = -0.072841615 Simplifying x = -0.072841615

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.372841615, -0.072841615}

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