x^2-2x-4=2.25x-5

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Solution for x^2-2x-4=2.25x-5 equation:


Simplifying
x2 + -2x + -4 = 2.25x + -5

Reorder the terms:
-4 + -2x + x2 = 2.25x + -5

Reorder the terms:
-4 + -2x + x2 = -5 + 2.25x

Solving
-4 + -2x + x2 = -5 + 2.25x

Solving for variable 'x'.

Reorder the terms:
-4 + 5 + -2x + -2.25x + x2 = -5 + 2.25x + 5 + -2.25x

Combine like terms: -4 + 5 = 1
1 + -2x + -2.25x + x2 = -5 + 2.25x + 5 + -2.25x

Combine like terms: -2x + -2.25x = -4.25x
1 + -4.25x + x2 = -5 + 2.25x + 5 + -2.25x

Reorder the terms:
1 + -4.25x + x2 = -5 + 5 + 2.25x + -2.25x

Combine like terms: -5 + 5 = 0
1 + -4.25x + x2 = 0 + 2.25x + -2.25x
1 + -4.25x + x2 = 2.25x + -2.25x

Combine like terms: 2.25x + -2.25x = 0.00
1 + -4.25x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -4.25x + -1 + x2 = 0.00 + -1

Reorder the terms:
1 + -1 + -4.25x + x2 = 0.00 + -1

Combine like terms: 1 + -1 = 0
0 + -4.25x + x2 = 0.00 + -1
-4.25x + x2 = 0.00 + -1

Combine like terms: 0.00 + -1 = -1
-4.25x + x2 = -1

The x term is -4.25x.  Take half its coefficient (-2.125).
Square it (4.515625) and add it to both sides.

Add '4.515625' to each side of the equation.
-4.25x + 4.515625 + x2 = -1 + 4.515625

Reorder the terms:
4.515625 + -4.25x + x2 = -1 + 4.515625

Combine like terms: -1 + 4.515625 = 3.515625
4.515625 + -4.25x + x2 = 3.515625

Factor a perfect square on the left side:
(x + -2.125)(x + -2.125) = 3.515625

Calculate the square root of the right side: 1.875

Break this problem into two subproblems by setting 
(x + -2.125) equal to 1.875 and -1.875.

Subproblem 1

x + -2.125 = 1.875 Simplifying x + -2.125 = 1.875 Reorder the terms: -2.125 + x = 1.875 Solving -2.125 + x = 1.875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = 1.875 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = 1.875 + 2.125 x = 1.875 + 2.125 Combine like terms: 1.875 + 2.125 = 4 x = 4 Simplifying x = 4

Subproblem 2

x + -2.125 = -1.875 Simplifying x + -2.125 = -1.875 Reorder the terms: -2.125 + x = -1.875 Solving -2.125 + x = -1.875 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.125' to each side of the equation. -2.125 + 2.125 + x = -1.875 + 2.125 Combine like terms: -2.125 + 2.125 = 0.000 0.000 + x = -1.875 + 2.125 x = -1.875 + 2.125 Combine like terms: -1.875 + 2.125 = 0.25 x = 0.25 Simplifying x = 0.25

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4, 0.25}

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