15d^2-225=0

Solution for 15d^2-225=0 equation:

Simplifying
15d2 + -225 = 0

Reorder the terms:
-225 + 15d2 = 0

Solving
-225 + 15d2 = 0

Solving for variable 'd'.

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

Add '225' to each side of the equation.
-225 + 225 + 15d2 = 0 + 225

Combine like terms: -225 + 225 = 0
0 + 15d2 = 0 + 225
15d2 = 0 + 225

Combine like terms: 0 + 225 = 225
15d2 = 225

Divide each side by '15'.
d2 = 15

Simplifying
d2 = 15

Take the square root of each side:
d = {-3.872983346, 3.872983346}