21.6=15v*v

Solution for 21.6=15v*v equation:

Simplifying
21.6 = 15v * v

Multiply v * v
21.6 = 15v2

Solving
21.6 = 15v2

Solving for variable 'v'.

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

Add '-15v2' to each side of the equation.
21.6 + -15v2 = 15v2 + -15v2

Combine like terms: 15v2 + -15v2 = 0
21.6 + -15v2 = 0

Add '-21.6' to each side of the equation.
21.6 + -21.6 + -15v2 = 0 + -21.6

Combine like terms: 21.6 + -21.6 = 0.0
0.0 + -15v2 = 0 + -21.6
-15v2 = 0 + -21.6

Combine like terms: 0 + -21.6 = -21.6
-15v2 = -21.6

Divide each side by '-15'.
v2 = 1.44

Simplifying
v2 = 1.44

Take the square root of each side:
v = {-1.2, 1.2}