(x-4)*(x-4)=6.25

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Solution for (x-4)*(x-4)=6.25 equation:


Simplifying
(x + -4)(x + -4) = 6.25

Reorder the terms:
(-4 + x)(x + -4) = 6.25

Reorder the terms:
(-4 + x)(-4 + x) = 6.25

Multiply (-4 + x) * (-4 + x)
(-4(-4 + x) + x(-4 + x)) = 6.25
((-4 * -4 + x * -4) + x(-4 + x)) = 6.25
((16 + -4x) + x(-4 + x)) = 6.25
(16 + -4x + (-4 * x + x * x)) = 6.25
(16 + -4x + (-4x + x2)) = 6.25

Combine like terms: -4x + -4x = -8x
(16 + -8x + x2) = 6.25

Solving
16 + -8x + x2 = 6.25

Solving for variable 'x'.

Reorder the terms:
16 + -6.25 + -8x + x2 = 6.25 + -6.25

Combine like terms: 16 + -6.25 = 9.75
9.75 + -8x + x2 = 6.25 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
9.75 + -8x + x2 = 0.00

Begin completing the square.

Move the constant term to the right:

Add '-9.75' to each side of the equation.
9.75 + -8x + -9.75 + x2 = 0.00 + -9.75

Reorder the terms:
9.75 + -9.75 + -8x + x2 = 0.00 + -9.75

Combine like terms: 9.75 + -9.75 = 0.00
0.00 + -8x + x2 = 0.00 + -9.75
-8x + x2 = 0.00 + -9.75

Combine like terms: 0.00 + -9.75 = -9.75
-8x + x2 = -9.75

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = -9.75 + 16

Reorder the terms:
16 + -8x + x2 = -9.75 + 16

Combine like terms: -9.75 + 16 = 6.25
16 + -8x + x2 = 6.25

Factor a perfect square on the left side:
(x + -4)(x + -4) = 6.25

Calculate the square root of the right side: 2.5

Break this problem into two subproblems by setting 
(x + -4) equal to 2.5 and -2.5.

Subproblem 1

x + -4 = 2.5 Simplifying x + -4 = 2.5 Reorder the terms: -4 + x = 2.5 Solving -4 + x = 2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 2.5 + 4 Combine like terms: -4 + 4 = 0 0 + x = 2.5 + 4 x = 2.5 + 4 Combine like terms: 2.5 + 4 = 6.5 x = 6.5 Simplifying x = 6.5

Subproblem 2

x + -4 = -2.5 Simplifying x + -4 = -2.5 Reorder the terms: -4 + x = -2.5 Solving -4 + x = -2.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -2.5 + 4 Combine like terms: -4 + 4 = 0 0 + x = -2.5 + 4 x = -2.5 + 4 Combine like terms: -2.5 + 4 = 1.5 x = 1.5 Simplifying x = 1.5

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.5, 1.5}

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