-25i^2+4=0

Solution for -25i^2+4=0 equation:

Simplifying
-25i2 + 4 = 0

Reorder the terms:
4 + -25i2 = 0

Solving
4 + -25i2 = 0

Solving for variable 'i'.

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

Add '-4' to each side of the equation.
4 + -4 + -25i2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -25i2 = 0 + -4
-25i2 = 0 + -4

Combine like terms: 0 + -4 = -4
-25i2 = -4

Divide each side by '-25'.
i2 = 0.16

Simplifying
i2 = 0.16

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