16=i^2*4

Solution for 16=i^2*4 equation:

Simplifying
16 = i2 * 4

Reorder the terms for easier multiplication:
16 = 4i2

Solving
16 = 4i2

Solving for variable 'i'.

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

Add '-4i2' to each side of the equation.
16 + -4i2 = 4i2 + -4i2

Combine like terms: 4i2 + -4i2 = 0
16 + -4i2 = 0

Add '-16' to each side of the equation.
16 + -16 + -4i2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -4i2 = 0 + -16
-4i2 = 0 + -16

Combine like terms: 0 + -16 = -16
-4i2 = -16

Divide each side by '-4'.
i2 = 4

Simplifying
i2 = 4

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