Question

can u plz solve this factorisation....​

Answer 1

Answer:

(5a-7)(a-3)

Step-by-step explanation:

Answer 2

Answer:

(a-21)(a-1)

Step-by-step explanation:

a²-22a+21

=a²-(21+1)a+21

=a²-21a-a+21

=a(a-21)-1(a-21)

=(a-21)(a-1)

Thank you please mark my answer as brainliest.