Question

$21psquare - 23pq - 20q {}^{2}$
factorise
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Answer 1

Hey buddy
Here’s ur answer
21p^2=3*7*p*p*1
23pq=23*p*q*1
20q^2=2*2*5*q*q*1
Common Factor=1
=1(21p^2-23pq-20q^2)

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