1.5x(2x-4)=1.5x+3

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Solution for 1.5x(2x-4)=1.5x+3 equation:


Simplifying
1.5x(2x + -4) = 1.5x + 3

Reorder the terms:
1.5x(-4 + 2x) = 1.5x + 3
(-4 * 1.5x + 2x * 1.5x) = 1.5x + 3
(-6x + 3x2) = 1.5x + 3

Reorder the terms:
-6x + 3x2 = 3 + 1.5x

Solving
-6x + 3x2 = 3 + 1.5x

Solving for variable 'x'.

Reorder the terms:
-3 + -6x + -1.5x + 3x2 = 3 + 1.5x + -3 + -1.5x

Combine like terms: -6x + -1.5x = -7.5x
-3 + -7.5x + 3x2 = 3 + 1.5x + -3 + -1.5x

Reorder the terms:
-3 + -7.5x + 3x2 = 3 + -3 + 1.5x + -1.5x

Combine like terms: 3 + -3 = 0
-3 + -7.5x + 3x2 = 0 + 1.5x + -1.5x
-3 + -7.5x + 3x2 = 1.5x + -1.5x

Combine like terms: 1.5x + -1.5x = 0.0
-3 + -7.5x + 3x2 = 0.0

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

Divide each side by '3'.
-1 + -2.5x + x2 = 0.0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -2.5x + 1 + x2 = 0.0 + 1

Reorder the terms:
-1 + 1 + -2.5x + x2 = 0.0 + 1

Combine like terms: -1 + 1 = 0
0 + -2.5x + x2 = 0.0 + 1
-2.5x + x2 = 0.0 + 1

Combine like terms: 0.0 + 1 = 1
-2.5x + x2 = 1

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 1 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 1 + 1.5625

Combine like terms: 1 + 1.5625 = 2.5625
1.5625 + -2.5x + x2 = 2.5625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 2.5625

Calculate the square root of the right side: 1.600781059

Break this problem into two subproblems by setting 
(x + -1.25) equal to 1.600781059 and -1.600781059.

Subproblem 1

x + -1.25 = 1.600781059 Simplifying x + -1.25 = 1.600781059 Reorder the terms: -1.25 + x = 1.600781059 Solving -1.25 + x = 1.600781059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.600781059 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.600781059 + 1.25 x = 1.600781059 + 1.25 Combine like terms: 1.600781059 + 1.25 = 2.850781059 x = 2.850781059 Simplifying x = 2.850781059

Subproblem 2

x + -1.25 = -1.600781059 Simplifying x + -1.25 = -1.600781059 Reorder the terms: -1.25 + x = -1.600781059 Solving -1.25 + x = -1.600781059 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.600781059 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.600781059 + 1.25 x = -1.600781059 + 1.25 Combine like terms: -1.600781059 + 1.25 = -0.350781059 x = -0.350781059 Simplifying x = -0.350781059

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.850781059, -0.350781059}

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