(d+5)(d-5)=

Solution for (d+5)(d-5)= equation:

Simplifying
(d + 5)(d + -5) = 0

Reorder the terms:
(5 + d)(d + -5) = 0

Reorder the terms:
(5 + d)(-5 + d) = 0

Multiply (5 + d) * (-5 + d)
(5(-5 + d) + d(-5 + d)) = 0
((-5 * 5 + d * 5) + d(-5 + d)) = 0
((-25 + 5d) + d(-5 + d)) = 0
(-25 + 5d + (-5 * d + d * d)) = 0
(-25 + 5d + (-5d + d2)) = 0

Combine like terms: 5d + -5d = 0
(-25 + 0 + d2) = 0
(-25 + d2) = 0

Solving
-25 + d2 = 0

Solving for variable 'd'.

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

Add '25' to each side of the equation.
-25 + 25 + d2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + d2 = 0 + 25
d2 = 0 + 25

Combine like terms: 0 + 25 = 25
d2 = 25

Simplifying
d2 = 25

Take the square root of each side:
d = {-5, 5}