18=(2x-3)(x-1)

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Solution for 18=(2x-3)(x-1) equation:


Simplifying
18 = (2x + -3)(x + -1)

Reorder the terms:
18 = (-3 + 2x)(x + -1)

Reorder the terms:
18 = (-3 + 2x)(-1 + x)

Multiply (-3 + 2x) * (-1 + x)
18 = (-3(-1 + x) + 2x * (-1 + x))
18 = ((-1 * -3 + x * -3) + 2x * (-1 + x))
18 = ((3 + -3x) + 2x * (-1 + x))
18 = (3 + -3x + (-1 * 2x + x * 2x))
18 = (3 + -3x + (-2x + 2x2))

Combine like terms: -3x + -2x = -5x
18 = (3 + -5x + 2x2)

Solving
18 = 3 + -5x + 2x2

Solving for variable 'x'.

Combine like terms: 18 + -3 = 15
15 + 5x + -2x2 = 3 + -5x + 2x2 + -3 + 5x + -2x2

Reorder the terms:
15 + 5x + -2x2 = 3 + -3 + -5x + 5x + 2x2 + -2x2

Combine like terms: 3 + -3 = 0
15 + 5x + -2x2 = 0 + -5x + 5x + 2x2 + -2x2
15 + 5x + -2x2 = -5x + 5x + 2x2 + -2x2

Combine like terms: -5x + 5x = 0
15 + 5x + -2x2 = 0 + 2x2 + -2x2
15 + 5x + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
15 + 5x + -2x2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-7.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '7.5' to each side of the equation.
-7.5 + -2.5x + 7.5 + x2 = 0 + 7.5

Reorder the terms:
-7.5 + 7.5 + -2.5x + x2 = 0 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
0.0 + -2.5x + x2 = 0 + 7.5
-2.5x + x2 = 0 + 7.5

Combine like terms: 0 + 7.5 = 7.5
-2.5x + x2 = 7.5

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 = 7.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 7.5 + 1.5625

Combine like terms: 7.5 + 1.5625 = 9.0625
1.5625 + -2.5x + x2 = 9.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 9.0625

Calculate the square root of the right side: 3.010398645

Break this problem into two subproblems by setting 
(x + -1.25) equal to 3.010398645 and -3.010398645.

Subproblem 1

x + -1.25 = 3.010398645 Simplifying x + -1.25 = 3.010398645 Reorder the terms: -1.25 + x = 3.010398645 Solving -1.25 + x = 3.010398645 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 = 3.010398645 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 3.010398645 + 1.25 x = 3.010398645 + 1.25 Combine like terms: 3.010398645 + 1.25 = 4.260398645 x = 4.260398645 Simplifying x = 4.260398645

Subproblem 2

x + -1.25 = -3.010398645 Simplifying x + -1.25 = -3.010398645 Reorder the terms: -1.25 + x = -3.010398645 Solving -1.25 + x = -3.010398645 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 = -3.010398645 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -3.010398645 + 1.25 x = -3.010398645 + 1.25 Combine like terms: -3.010398645 + 1.25 = -1.760398645 x = -1.760398645 Simplifying x = -1.760398645

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.260398645, -1.760398645}

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