(x-4)*(x-4)=486

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Solution for (x-4)*(x-4)=486 equation:


Simplifying
(x + -4)(x + -4) = 486

Reorder the terms:
(-4 + x)(x + -4) = 486

Reorder the terms:
(-4 + x)(-4 + x) = 486

Multiply (-4 + x) * (-4 + x)
(-4(-4 + x) + x(-4 + x)) = 486
((-4 * -4 + x * -4) + x(-4 + x)) = 486
((16 + -4x) + x(-4 + x)) = 486
(16 + -4x + (-4 * x + x * x)) = 486
(16 + -4x + (-4x + x2)) = 486

Combine like terms: -4x + -4x = -8x
(16 + -8x + x2) = 486

Solving
16 + -8x + x2 = 486

Solving for variable 'x'.

Reorder the terms:
16 + -486 + -8x + x2 = 486 + -486

Combine like terms: 16 + -486 = -470
-470 + -8x + x2 = 486 + -486

Combine like terms: 486 + -486 = 0
-470 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '470' to each side of the equation.
-470 + -8x + 470 + x2 = 0 + 470

Reorder the terms:
-470 + 470 + -8x + x2 = 0 + 470

Combine like terms: -470 + 470 = 0
0 + -8x + x2 = 0 + 470
-8x + x2 = 0 + 470

Combine like terms: 0 + 470 = 470
-8x + x2 = 470

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 = 470 + 16

Reorder the terms:
16 + -8x + x2 = 470 + 16

Combine like terms: 470 + 16 = 486
16 + -8x + x2 = 486

Factor a perfect square on the left side:
(x + -4)(x + -4) = 486

Calculate the square root of the right side: 22.045407685

Break this problem into two subproblems by setting 
(x + -4) equal to 22.045407685 and -22.045407685.

Subproblem 1

x + -4 = 22.045407685 Simplifying x + -4 = 22.045407685 Reorder the terms: -4 + x = 22.045407685 Solving -4 + x = 22.045407685 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 = 22.045407685 + 4 Combine like terms: -4 + 4 = 0 0 + x = 22.045407685 + 4 x = 22.045407685 + 4 Combine like terms: 22.045407685 + 4 = 26.045407685 x = 26.045407685 Simplifying x = 26.045407685

Subproblem 2

x + -4 = -22.045407685 Simplifying x + -4 = -22.045407685 Reorder the terms: -4 + x = -22.045407685 Solving -4 + x = -22.045407685 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 = -22.045407685 + 4 Combine like terms: -4 + 4 = 0 0 + x = -22.045407685 + 4 x = -22.045407685 + 4 Combine like terms: -22.045407685 + 4 = -18.045407685 x = -18.045407685 Simplifying x = -18.045407685

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.045407685, -18.045407685}

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