human
Factorise a single bracket containing a non-linear expression by taking out a single algebraic common factor (e.g. a) What should replace the circle when this expression is fully factorised? \( 9 y^{2}+4 y \equiv \bigstar(\triangle y+\bigcirc) \) \( \bigcirc=4 y \)
gpt
When factorising into single brackets, only factors out the numerical values and forgets to factorise possible variables