Question

factorise the following
$(a - 8) ^{2} - 4a$
​

Answer 1

[(a-8)-(2√a)] [(a-8)+(2√a)]

a²-b²= (a-b) (a+b)

Answer 2

Step-by-step explanation:

(a-b)²=a²+b²-2ab

=a²+64-16a -4a

=a²-20a +64