(d-1)(d+11)=0

Solution for (d-1)(d+11)=0 equation:

Simplifying
(d + -1)(d + 11) = 0

Reorder the terms:
(-1 + d)(d + 11) = 0

Reorder the terms:
(-1 + d)(11 + d) = 0

Multiply (-1 + d) * (11 + d)
(-1(11 + d) + d(11 + d)) = 0
((11 * -1 + d * -1) + d(11 + d)) = 0
((-11 + -1d) + d(11 + d)) = 0
(-11 + -1d + (11 * d + d * d)) = 0
(-11 + -1d + (11d + d2)) = 0

Combine like terms: -1d + 11d = 10d
(-11 + 10d + d2) = 0

Solving
-11 + 10d + d2 = 0

Solving for variable 'd'.

Factor a trinomial.
(-11 + -1d)(1 + -1d) = 0

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

Simplifying
-11 + -1d = 0

Solving
-11 + -1d = 0

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

Add '11' to each side of the equation.
-11 + 11 + -1d = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -1d = 0 + 11
-1d = 0 + 11

Combine like terms: 0 + 11 = 11
-1d = 11

Divide each side by '-1'.
d = -11

Simplifying
d = -11
Subproblem 2
Set the factor '(1 + -1d)' equal to zero and attempt to solve:

Simplifying
1 + -1d = 0

Solving
1 + -1d = 0

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

Add '-1' to each side of the equation.
1 + -1 + -1d = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -1d = 0 + -1
-1d = 0 + -1

Combine like terms: 0 + -1 = -1
-1d = -1

Divide each side by '-1'.
d = 1

Simplifying
d = 1
Solution
d = {-11, 1}