d^2+16d+63=0

Solution for d^2+16d+63=0 equation:

Simplifying
d2 + 16d + 63 = 0

Reorder the terms:
63 + 16d + d2 = 0

Solving
63 + 16d + d2 = 0

Solving for variable 'd'.

Factor a trinomial.
(9 + d)(7 + d) = 0

Subproblem 1
Set the factor '(9 + d)' equal to zero and attempt to solve:

Simplifying
9 + d = 0

Solving
9 + d = 0

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

Add '-9' to each side of the equation.
9 + -9 + d = 0 + -9

Combine like terms: 9 + -9 = 0
0 + d = 0 + -9
d = 0 + -9

Combine like terms: 0 + -9 = -9
d = -9

Simplifying
d = -9
Subproblem 2
Set the factor '(7 + d)' equal to zero and attempt to solve:

Simplifying
7 + d = 0

Solving
7 + d = 0

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

Add '-7' to each side of the equation.
7 + -7 + d = 0 + -7

Combine like terms: 7 + -7 = 0
0 + d = 0 + -7
d = 0 + -7

Combine like terms: 0 + -7 = -7
d = -7

Simplifying
d = -7
Solution
d = {-9, -7}