(x-2)(x-1)-2.50x-0.42=0

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Solution for (x-2)(x-1)-2.50x-0.42=0 equation:


Simplifying
(x + -2)(x + -1) + -2.50x + -0.42 = 0

Reorder the terms:
(-2 + x)(x + -1) + -2.50x + -0.42 = 0

Reorder the terms:
(-2 + x)(-1 + x) + -2.50x + -0.42 = 0

Multiply (-2 + x) * (-1 + x)
(-2(-1 + x) + x(-1 + x)) + -2.50x + -0.42 = 0
((-1 * -2 + x * -2) + x(-1 + x)) + -2.50x + -0.42 = 0
((2 + -2x) + x(-1 + x)) + -2.50x + -0.42 = 0
(2 + -2x + (-1 * x + x * x)) + -2.50x + -0.42 = 0
(2 + -2x + (-1x + x2)) + -2.50x + -0.42 = 0

Combine like terms: -2x + -1x = -3x
(2 + -3x + x2) + -2.50x + -0.42 = 0

Reorder the terms:
2 + -0.42 + -3x + -2.50x + x2 = 0

Combine like terms: 2 + -0.42 = 1.58
1.58 + -3x + -2.50x + x2 = 0

Combine like terms: -3x + -2.50x = -5.5x
1.58 + -5.5x + x2 = 0

Solving
1.58 + -5.5x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-1.58' to each side of the equation.
1.58 + -5.5x + -1.58 + x2 = 0 + -1.58

Reorder the terms:
1.58 + -1.58 + -5.5x + x2 = 0 + -1.58

Combine like terms: 1.58 + -1.58 = 0.00
0.00 + -5.5x + x2 = 0 + -1.58
-5.5x + x2 = 0 + -1.58

Combine like terms: 0 + -1.58 = -1.58
-5.5x + x2 = -1.58

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = -1.58 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = -1.58 + 7.5625

Combine like terms: -1.58 + 7.5625 = 5.9825
7.5625 + -5.5x + x2 = 5.9825

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = 5.9825

Calculate the square root of the right side: 2.445914962

Break this problem into two subproblems by setting 
(x + -2.75) equal to 2.445914962 and -2.445914962.

Subproblem 1

x + -2.75 = 2.445914962 Simplifying x + -2.75 = 2.445914962 Reorder the terms: -2.75 + x = 2.445914962 Solving -2.75 + x = 2.445914962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = 2.445914962 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = 2.445914962 + 2.75 x = 2.445914962 + 2.75 Combine like terms: 2.445914962 + 2.75 = 5.195914962 x = 5.195914962 Simplifying x = 5.195914962

Subproblem 2

x + -2.75 = -2.445914962 Simplifying x + -2.75 = -2.445914962 Reorder the terms: -2.75 + x = -2.445914962 Solving -2.75 + x = -2.445914962 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = -2.445914962 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = -2.445914962 + 2.75 x = -2.445914962 + 2.75 Combine like terms: -2.445914962 + 2.75 = 0.304085038 x = 0.304085038 Simplifying x = 0.304085038

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.195914962, 0.304085038}

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