(x-2.3)(x-2.3)=25

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Solution for (x-2.3)(x-2.3)=25 equation:


Simplifying
(x + -2.3)(x + -2.3) = 25

Reorder the terms:
(-2.3 + x)(x + -2.3) = 25

Reorder the terms:
(-2.3 + x)(-2.3 + x) = 25

Multiply (-2.3 + x) * (-2.3 + x)
(-2.3(-2.3 + x) + x(-2.3 + x)) = 25
((-2.3 * -2.3 + x * -2.3) + x(-2.3 + x)) = 25
((5.29 + -2.3x) + x(-2.3 + x)) = 25
(5.29 + -2.3x + (-2.3 * x + x * x)) = 25
(5.29 + -2.3x + (-2.3x + x2)) = 25

Combine like terms: -2.3x + -2.3x = -4.6x
(5.29 + -4.6x + x2) = 25

Solving
5.29 + -4.6x + x2 = 25

Solving for variable 'x'.

Reorder the terms:
5.29 + -25 + -4.6x + x2 = 25 + -25

Combine like terms: 5.29 + -25 = -19.71
-19.71 + -4.6x + x2 = 25 + -25

Combine like terms: 25 + -25 = 0
-19.71 + -4.6x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '19.71' to each side of the equation.
-19.71 + -4.6x + 19.71 + x2 = 0 + 19.71

Reorder the terms:
-19.71 + 19.71 + -4.6x + x2 = 0 + 19.71

Combine like terms: -19.71 + 19.71 = 0.00
0.00 + -4.6x + x2 = 0 + 19.71
-4.6x + x2 = 0 + 19.71

Combine like terms: 0 + 19.71 = 19.71
-4.6x + x2 = 19.71

The x term is -4.6x.  Take half its coefficient (-2.3).
Square it (5.29) and add it to both sides.

Add '5.29' to each side of the equation.
-4.6x + 5.29 + x2 = 19.71 + 5.29

Reorder the terms:
5.29 + -4.6x + x2 = 19.71 + 5.29

Combine like terms: 19.71 + 5.29 = 25
5.29 + -4.6x + x2 = 25

Factor a perfect square on the left side:
(x + -2.3)(x + -2.3) = 25

Calculate the square root of the right side: 5

Break this problem into two subproblems by setting 
(x + -2.3) equal to 5 and -5.

Subproblem 1

x + -2.3 = 5 Simplifying x + -2.3 = 5 Reorder the terms: -2.3 + x = 5 Solving -2.3 + x = 5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + x = 5 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + x = 5 + 2.3 x = 5 + 2.3 Combine like terms: 5 + 2.3 = 7.3 x = 7.3 Simplifying x = 7.3

Subproblem 2

x + -2.3 = -5 Simplifying x + -2.3 = -5 Reorder the terms: -2.3 + x = -5 Solving -2.3 + x = -5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.3' to each side of the equation. -2.3 + 2.3 + x = -5 + 2.3 Combine like terms: -2.3 + 2.3 = 0.0 0.0 + x = -5 + 2.3 x = -5 + 2.3 Combine like terms: -5 + 2.3 = -2.7 x = -2.7 Simplifying x = -2.7

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.3, -2.7}

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