x^2+16x+64=9

Solution for x^2+16x+64=9 equation:

Simplifying
x2 + 16x + 64 = 9

Reorder the terms:
64 + 16x + x2 = 9

Solving
64 + 16x + x2 = 9

Solving for variable 'x'.

Reorder the terms:
64 + -9 + 16x + x2 = 9 + -9

Combine like terms: 64 + -9 = 55
55 + 16x + x2 = 9 + -9

Combine like terms: 9 + -9 = 0
55 + 16x + x2 = 0

Factor a trinomial.
(11 + x)(5 + x) = 0

Subproblem 1
Set the factor '(11 + x)' equal to zero and attempt to solve:

Simplifying
11 + x = 0

Solving
11 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-11' to each side of the equation.
11 + -11 + x = 0 + -11

Combine like terms: 11 + -11 = 0
0 + x = 0 + -11
x = 0 + -11

Combine like terms: 0 + -11 = -11
x = -11

Simplifying
x = -11
Subproblem 2
Set the factor '(5 + x)' equal to zero and attempt to solve:

Simplifying
5 + x = 0

Solving
5 + x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-5' to each side of the equation.
5 + -5 + x = 0 + -5

Combine like terms: 5 + -5 = 0
0 + x = 0 + -5
x = 0 + -5

Combine like terms: 0 + -5 = -5
x = -5

Simplifying
x = -5
Solution
x = {-11, -5}