(-d+4)(-d-4)=

Solution for (-d+4)(-d-4)= equation:

Simplifying
(-1d + 4)(-1d + -4) = 0

Reorder the terms:
(4 + -1d)(-1d + -4) = 0

Reorder the terms:
(4 + -1d)(-4 + -1d) = 0

Multiply (4 + -1d) * (-4 + -1d)
(4(-4 + -1d) + -1d * (-4 + -1d)) = 0
((-4 * 4 + -1d * 4) + -1d * (-4 + -1d)) = 0
((-16 + -4d) + -1d * (-4 + -1d)) = 0
(-16 + -4d + (-4 * -1d + -1d * -1d)) = 0
(-16 + -4d + (4d + 1d2)) = 0

Combine like terms: -4d + 4d = 0
(-16 + 0 + 1d2) = 0
(-16 + 1d2) = 0

Solving
-16 + 1d2 = 0

Solving for variable 'd'.

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

Add '16' to each side of the equation.
-16 + 16 + 1d2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 1d2 = 0 + 16
1d2 = 0 + 16

Combine like terms: 0 + 16 = 16
1d2 = 16

Divide each side by '1'.
d2 = 16

Simplifying
d2 = 16

Take the square root of each side:
d = {-4, 4}