Question

( rightarrow ) Frace of ( A=2 a ). will te divinite of ( p )
[
begin{array}{l}
y quad y=20
1 A 1=a^{2}-6 c
end{array}
]
for ( left(a^{2}-b cright) ) to be divinite of ( p ) ordured pabrs
". there are exactly ( (p-1) ) a ( (8, c) ) for any
[
therefore operatorname{Req} cdot n 0 cdot ln (p-1)^{2}
]

# 8. The number of A in T, such that the trace of A is not divisible by p but det (A) is divisible by pis (a) (p-1)(p2-p+1) (b) p8 - (p-1)2 (c) (p-1)2 (d) (p-1) (p2-2)

Solution