A square minus 23a plus 42
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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
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