Question

The middleterm of a²-12a+729=0

Answer 1

-12a is the middle term
u can factorize it by splitting up of middle term or formula method

Answer 2

middle term is -12a
to factories there are two methods split middle term or Sri dharacharya formula
${ - b + - \sqrt{ {b}^{2} - 4ac } \div 2a$