3(x^2-8x+16)=18

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Solution for 3(x^2-8x+16)=18 equation: 


Simplifying
3(x2 + -8x + 16) = 18

Reorder the terms:
3(16 + -8x + x2) = 18
(16 * 3 + -8x * 3 + x2 * 3) = 18
(48 + -24x + 3x2) = 18

Solving
48 + -24x + 3x2 = 18

Solving for variable 'x'.

Reorder the terms:
48 + -18 + -24x + 3x2 = 18 + -18

Combine like terms: 48 + -18 = 30
30 + -24x + 3x2 = 18 + -18

Combine like terms: 18 + -18 = 0
30 + -24x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(10 + -8x + x2) = 0

Ignore the factor 3.

Subproblem 1
Set the factor '(10 + -8x + x2)' equal to zero and attempt to solve:

Simplifying
10 + -8x + x2 = 0

Solving
10 + -8x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -8x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -8x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -8x + x2 = 0 + -10
-8x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-8x + x2 = -10

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 = -10 + 16

Reorder the terms:
16 + -8x + x2 = -10 + 16

Combine like terms: -10 + 16 = 6
16 + -8x + x2 = 6

Factor a perfect square on the left side:
(x + -4)(x + -4) = 6

Calculate the square root of the right side: 2.449489743

Break this problem into two subproblems by setting 
(x + -4) equal to 2.449489743 and -2.449489743.


Subproblem 1
x + -4 = 2.449489743

Simplifying
x + -4 = 2.449489743

Reorder the terms:
-4 + x = 2.449489743

Solving
-4 + x = 2.449489743

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 = 2.449489743 + 4

Combine like terms: -4 + 4 = 0
0 + x = 2.449489743 + 4
x = 2.449489743 + 4

Combine like terms: 2.449489743 + 4 = 6.449489743
x = 6.449489743

Simplifying
x = 6.449489743


Subproblem 2
x + -4 = -2.449489743

Simplifying
x + -4 = -2.449489743

Reorder the terms:
-4 + x = -2.449489743

Solving
-4 + x = -2.449489743

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 = -2.449489743 + 4

Combine like terms: -4 + 4 = 0
0 + x = -2.449489743 + 4
x = -2.449489743 + 4

Combine like terms: -2.449489743 + 4 = 1.550510257
x = 1.550510257

Simplifying
x = 1.550510257


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {6.449489743, 1.550510257}
Solution
x = {6.449489743, 1.550510257}

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