Question

factorise a2 - 16a + 39​

Answer 1

a²-16a+39

here LCM of variable of a² and 39 is 39, thus

to obtain 16,we can divide 39 as 13×3

therefore after factorisation the following equation will be :-

a² -13a - 3a + 39

a(a - 13) -3(a-13)

=( a - 3)(a -13)

Answer 2

a2 - 16a +39=0
a2 -3a -13a +39=0