25d^2-4=0

Solution for 25d^2-4=0 equation:

Simplifying
25d2 + -4 = 0

Reorder the terms:
-4 + 25d2 = 0

Solving
-4 + 25d2 = 0

Solving for variable 'd'.

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

Add '4' to each side of the equation.
-4 + 4 + 25d2 = 0 + 4

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

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

Divide each side by '25'.
d2 = 0.16

Simplifying
d2 = 0.16

Take the square root of each side:
d = {-0.4, 0.4}