100=b^2*81

Solution for 100=b^2*81 equation:

Simplifying
100 = b2 * 81

Reorder the terms for easier multiplication:
100 = 81b2

Solving
100 = 81b2

Solving for variable 'b'.

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

Add '-81b2' to each side of the equation.
100 + -81b2 = 81b2 + -81b2

Combine like terms: 81b2 + -81b2 = 0
100 + -81b2 = 0

Add '-100' to each side of the equation.
100 + -100 + -81b2 = 0 + -100

Combine like terms: 100 + -100 = 0
0 + -81b2 = 0 + -100
-81b2 = 0 + -100

Combine like terms: 0 + -100 = -100
-81b2 = -100

Divide each side by '-81'.
b2 = 1.234567901

Simplifying
b2 = 1.234567901

Take the square root of each side:
b = {-1.111111111, 1.111111111}