Question

A square minus 23a plus 42

Answer 1

Answer:

what I have to do ??? In this question

Let me take out its zeroes

Step-by-step explanation:

a^2-23a+42

= a^2-2a-21a+42

( By Middle term splitting)

=a(a-2)-21(a-2) [Taking common]

=(a-21)(a-2)

=a-21=0 AND a-2=0

a=21 ,a=2