1=0.25d^2

Solution for 1=0.25d^2 equation:

Simplifying
1 = 0.25d2

Solving
1 = 0.25d2

Solving for variable 'd'.

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

Add '-0.25d2' to each side of the equation.
1 + -0.25d2 = 0.25d2 + -0.25d2

Combine like terms: 0.25d2 + -0.25d2 = 0.00
1 + -0.25d2 = 0.00

Add '-1' to each side of the equation.
1 + -1 + -0.25d2 = 0.00 + -1

Combine like terms: 1 + -1 = 0
0 + -0.25d2 = 0.00 + -1
-0.25d2 = 0.00 + -1

Combine like terms: 0.00 + -1 = -1
-0.25d2 = -1

Divide each side by '-0.25'.
d2 = 4

Simplifying
d2 = 4

Take the square root of each side:
d = {-2, 2}