X^2+8X+16=60

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Solution for X^2+8X+16=60 equation:


Simplifying
X2 + 8X + 16 = 60

Reorder the terms:
16 + 8X + X2 = 60

Solving
16 + 8X + X2 = 60

Solving for variable 'X'.

Reorder the terms:
16 + -60 + 8X + X2 = 60 + -60

Combine like terms: 16 + -60 = -44
-44 + 8X + X2 = 60 + -60

Combine like terms: 60 + -60 = 0
-44 + 8X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '44' to each side of the equation.
-44 + 8X + 44 + X2 = 0 + 44

Reorder the terms:
-44 + 44 + 8X + X2 = 0 + 44

Combine like terms: -44 + 44 = 0
0 + 8X + X2 = 0 + 44
8X + X2 = 0 + 44

Combine like terms: 0 + 44 = 44
8X + X2 = 44

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 = 44 + 16

Reorder the terms:
16 + 8X + X2 = 44 + 16

Combine like terms: 44 + 16 = 60
16 + 8X + X2 = 60

Factor a perfect square on the left side:
(X + 4)(X + 4) = 60

Calculate the square root of the right side: 7.745966692

Break this problem into two subproblems by setting 
(X + 4) equal to 7.745966692 and -7.745966692.

Subproblem 1

X + 4 = 7.745966692 Simplifying X + 4 = 7.745966692 Reorder the terms: 4 + X = 7.745966692 Solving 4 + X = 7.745966692 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 = 7.745966692 + -4 Combine like terms: 4 + -4 = 0 0 + X = 7.745966692 + -4 X = 7.745966692 + -4 Combine like terms: 7.745966692 + -4 = 3.745966692 X = 3.745966692 Simplifying X = 3.745966692

Subproblem 2

X + 4 = -7.745966692 Simplifying X + 4 = -7.745966692 Reorder the terms: 4 + X = -7.745966692 Solving 4 + X = -7.745966692 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 = -7.745966692 + -4 Combine like terms: 4 + -4 = 0 0 + X = -7.745966692 + -4 X = -7.745966692 + -4 Combine like terms: -7.745966692 + -4 = -11.745966692 X = -11.745966692 Simplifying X = -11.745966692

Solution

The solution to the problem is based on the solutions from the subproblems. X = {3.745966692, -11.745966692}

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