(5-2d)(5+2d)=

Solution for (5-2d)(5+2d)= equation:

Simplifying
(5 + -2d)(5 + 2d) = 0

Multiply (5 + -2d) * (5 + 2d)
(5(5 + 2d) + -2d * (5 + 2d)) = 0
((5 * 5 + 2d * 5) + -2d * (5 + 2d)) = 0
((25 + 10d) + -2d * (5 + 2d)) = 0
(25 + 10d + (5 * -2d + 2d * -2d)) = 0
(25 + 10d + (-10d + -4d2)) = 0

Combine like terms: 10d + -10d = 0
(25 + 0 + -4d2) = 0
(25 + -4d2) = 0

Solving
25 + -4d2 = 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 + -4d2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + -4d2 = 0 + -25
-4d2 = 0 + -25

Combine like terms: 0 + -25 = -25
-4d2 = -25

Divide each side by '-4'.
d2 = 6.25

Simplifying
d2 = 6.25

Take the square root of each side:
d = {-2.5, 2.5}