8b^2-5=123

Solution for 8b^2-5=123 equation:

Simplifying
8b2 + -5 = 123

Reorder the terms:
-5 + 8b2 = 123

Solving
-5 + 8b2 = 123

Solving for variable 'b'.

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

Add '5' to each side of the equation.
-5 + 5 + 8b2 = 123 + 5

Combine like terms: -5 + 5 = 0
0 + 8b2 = 123 + 5
8b2 = 123 + 5

Combine like terms: 123 + 5 = 128
8b2 = 128

Divide each side by '8'.
b2 = 16

Simplifying
b2 = 16

Take the square root of each side:
b = {-4, 4}