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? \( 3 a^{2}+2 a \equiv \bigstar(\triangle a+\bigcirc) \) \( \bigcirc=2 a \)
gpt
Believes only the first term needs to be divided when factorising an expression