Question

Factor completely.
(0.81y^2-0.0016)

Answer 1

\[\large 0.81y^2-0.0016\]


\[\large (0.9y)^2-(0.04)^2\]


\[\large (0.9y-0.04)(0.9y+0.04)\]

Answer 2

You can represent the answer as \[\large (\frac{9y}{10}-\frac{4}{100})(\frac{9y}{10}+\frac{4}{100})\]