20=I^2(5)

Solution for 20=I^2(5) equation:

Simplifying
20 = I2(5)

Reorder the terms for easier multiplication:
20 = 5I2

Solving
20 = 5I2

Solving for variable 'I'.

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

Add '-5I2' to each side of the equation.
20 + -5I2 = 5I2 + -5I2

Combine like terms: 5I2 + -5I2 = 0
20 + -5I2 = 0

Add '-20' to each side of the equation.
20 + -20 + -5I2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -5I2 = 0 + -20
-5I2 = 0 + -20

Combine like terms: 0 + -20 = -20
-5I2 = -20

Divide each side by '-5'.
I2 = 4

Simplifying
I2 = 4

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