9=4b^2

Solution for 9=4b^2 equation:

Simplifying
9 = 4b2

Solving
9 = 4b2

Solving for variable 'b'.

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

Add '-4b2' to each side of the equation.
9 + -4b2 = 4b2 + -4b2

Combine like terms: 4b2 + -4b2 = 0
9 + -4b2 = 0

Add '-9' to each side of the equation.
9 + -9 + -4b2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -4b2 = 0 + -9
-4b2 = 0 + -9

Combine like terms: 0 + -9 = -9
-4b2 = -9

Divide each side by '-4'.
b2 = 2.25

Simplifying
b2 = 2.25

Take the square root of each side:
b = {-1.5, 1.5}