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

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


Simplifying
3x + 4x(3 + -5x) = 2
3x + (3 * 4x + -5x * 4x) = 2
3x + (12x + -20x2) = 2

Combine like terms: 3x + 12x = 15x
15x + -20x2 = 2

Solving
15x + -20x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + 15x + -20x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + 15x + -20x2 = 0

Begin completing the square.  Divide all terms by
-20 the coefficient of the squared term: 

Divide each side by '-20'.
0.1 + -0.75x + x2 = 0.0

Move the constant term to the right:

Add '-0.1' to each side of the equation.
0.1 + -0.75x + -0.1 + x2 = 0.0 + -0.1

Reorder the terms:
0.1 + -0.1 + -0.75x + x2 = 0.0 + -0.1

Combine like terms: 0.1 + -0.1 = 0.0
0.0 + -0.75x + x2 = 0.0 + -0.1
-0.75x + x2 = 0.0 + -0.1

Combine like terms: 0.0 + -0.1 = -0.1
-0.75x + x2 = -0.1

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = -0.1 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -0.1 + 0.140625

Combine like terms: -0.1 + 0.140625 = 0.040625
0.140625 + -0.75x + x2 = 0.040625

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = 0.040625

Calculate the square root of the right side: 0.201556444

Break this problem into two subproblems by setting 
(x + -0.375) equal to 0.201556444 and -0.201556444.

Subproblem 1

x + -0.375 = 0.201556444 Simplifying x + -0.375 = 0.201556444 Reorder the terms: -0.375 + x = 0.201556444 Solving -0.375 + x = 0.201556444 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = 0.201556444 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = 0.201556444 + 0.375 x = 0.201556444 + 0.375 Combine like terms: 0.201556444 + 0.375 = 0.576556444 x = 0.576556444 Simplifying x = 0.576556444

Subproblem 2

x + -0.375 = -0.201556444 Simplifying x + -0.375 = -0.201556444 Reorder the terms: -0.375 + x = -0.201556444 Solving -0.375 + x = -0.201556444 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.375' to each side of the equation. -0.375 + 0.375 + x = -0.201556444 + 0.375 Combine like terms: -0.375 + 0.375 = 0.000 0.000 + x = -0.201556444 + 0.375 x = -0.201556444 + 0.375 Combine like terms: -0.201556444 + 0.375 = 0.173443556 x = 0.173443556 Simplifying x = 0.173443556

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.576556444, 0.173443556}

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