(2X-1)(X-3)=4

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Solution for (2X-1)(X-3)=4 equation:


Simplifying
(2X + -1)(X + -3) = 4

Reorder the terms:
(-1 + 2X)(X + -3) = 4

Reorder the terms:
(-1 + 2X)(-3 + X) = 4

Multiply (-1 + 2X) * (-3 + X)
(-1(-3 + X) + 2X * (-3 + X)) = 4
((-3 * -1 + X * -1) + 2X * (-3 + X)) = 4
((3 + -1X) + 2X * (-3 + X)) = 4
(3 + -1X + (-3 * 2X + X * 2X)) = 4
(3 + -1X + (-6X + 2X2)) = 4

Combine like terms: -1X + -6X = -7X
(3 + -7X + 2X2) = 4

Solving
3 + -7X + 2X2 = 4

Solving for variable 'X'.

Reorder the terms:
3 + -4 + -7X + 2X2 = 4 + -4

Combine like terms: 3 + -4 = -1
-1 + -7X + 2X2 = 4 + -4

Combine like terms: 4 + -4 = 0
-1 + -7X + 2X2 = 0

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

Divide each side by '2'.
-0.5 + -3.5X + X2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -3.5X + 0.5 + X2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -3.5X + X2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -3.5X + X2 = 0 + 0.5
-3.5X + X2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-3.5X + X2 = 0.5

The X term is -3.5X.  Take half its coefficient (-1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
-3.5X + 3.0625 + X2 = 0.5 + 3.0625

Reorder the terms:
3.0625 + -3.5X + X2 = 0.5 + 3.0625

Combine like terms: 0.5 + 3.0625 = 3.5625
3.0625 + -3.5X + X2 = 3.5625

Factor a perfect square on the left side:
(X + -1.75)(X + -1.75) = 3.5625

Calculate the square root of the right side: 1.887458609

Break this problem into two subproblems by setting 
(X + -1.75) equal to 1.887458609 and -1.887458609.

Subproblem 1

X + -1.75 = 1.887458609 Simplifying X + -1.75 = 1.887458609 Reorder the terms: -1.75 + X = 1.887458609 Solving -1.75 + X = 1.887458609 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + X = 1.887458609 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + X = 1.887458609 + 1.75 X = 1.887458609 + 1.75 Combine like terms: 1.887458609 + 1.75 = 3.637458609 X = 3.637458609 Simplifying X = 3.637458609

Subproblem 2

X + -1.75 = -1.887458609 Simplifying X + -1.75 = -1.887458609 Reorder the terms: -1.75 + X = -1.887458609 Solving -1.75 + X = -1.887458609 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.75' to each side of the equation. -1.75 + 1.75 + X = -1.887458609 + 1.75 Combine like terms: -1.75 + 1.75 = 0.00 0.00 + X = -1.887458609 + 1.75 X = -1.887458609 + 1.75 Combine like terms: -1.887458609 + 1.75 = -0.137458609 X = -0.137458609 Simplifying X = -0.137458609

Solution

The solution to the problem is based on the solutions from the subproblems. X = {3.637458609, -0.137458609}

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