X^2-8X+16=3

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Solution for X^2-8X+16=3 equation:


Simplifying
X2 + -8X + 16 = 3

Reorder the terms:
16 + -8X + X2 = 3

Solving
16 + -8X + X2 = 3

Solving for variable 'X'.

Reorder the terms:
16 + -3 + -8X + X2 = 3 + -3

Combine like terms: 16 + -3 = 13
13 + -8X + X2 = 3 + -3

Combine like terms: 3 + -3 = 0
13 + -8X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + -8X + -13 + X2 = 0 + -13

Reorder the terms:
13 + -13 + -8X + X2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -8X + X2 = 0 + -13
-8X + X2 = 0 + -13

Combine like terms: 0 + -13 = -13
-8X + X2 = -13

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 = -13 + 16

Reorder the terms:
16 + -8X + X2 = -13 + 16

Combine like terms: -13 + 16 = 3
16 + -8X + X2 = 3

Factor a perfect square on the left side:
(X + -4)(X + -4) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(X + -4) equal to 1.732050808 and -1.732050808.

Subproblem 1

X + -4 = 1.732050808 Simplifying X + -4 = 1.732050808 Reorder the terms: -4 + X = 1.732050808 Solving -4 + X = 1.732050808 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 = 1.732050808 + 4 Combine like terms: -4 + 4 = 0 0 + X = 1.732050808 + 4 X = 1.732050808 + 4 Combine like terms: 1.732050808 + 4 = 5.732050808 X = 5.732050808 Simplifying X = 5.732050808

Subproblem 2

X + -4 = -1.732050808 Simplifying X + -4 = -1.732050808 Reorder the terms: -4 + X = -1.732050808 Solving -4 + X = -1.732050808 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 = -1.732050808 + 4 Combine like terms: -4 + 4 = 0 0 + X = -1.732050808 + 4 X = -1.732050808 + 4 Combine like terms: -1.732050808 + 4 = 2.267949192 X = 2.267949192 Simplifying X = 2.267949192

Solution

The solution to the problem is based on the solutions from the subproblems. X = {5.732050808, 2.267949192}

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