(d-6)*(d+6)=

Solution for (d-6)*(d+6)= equation:

Simplifying
(d + -6)(d + 6) = 0

Reorder the terms:
(-6 + d)(d + 6) = 0

Reorder the terms:
(-6 + d)(6 + d) = 0

Multiply (-6 + d) * (6 + d)
(-6(6 + d) + d(6 + d)) = 0
((6 * -6 + d * -6) + d(6 + d)) = 0
((-36 + -6d) + d(6 + d)) = 0
(-36 + -6d + (6 * d + d * d)) = 0
(-36 + -6d + (6d + d2)) = 0

Combine like terms: -6d + 6d = 0
(-36 + 0 + d2) = 0
(-36 + d2) = 0

Solving
-36 + d2 = 0

Solving for variable 'd'.

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

Add '36' to each side of the equation.
-36 + 36 + d2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + d2 = 0 + 36
d2 = 0 + 36

Combine like terms: 0 + 36 = 36
d2 = 36

Simplifying
d2 = 36

Take the square root of each side:
d = {-6, 6}