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2^n
= (2^2n+4) × 2^2n × 2^n+2 =>koefisien sudah sama !!
2^2n
= 2n+4 × 2n × 2n+2
2n
= 2n+4 × 1 × 2n+2
= 2n+4 × 2n+2
= 4n + 8
4n = -8
n = -2
kalo diatas ga ada jawabannnya.
pake cara ini :
(2n+4) (2n+2)
= 4n²+4n+8n+8
= 4n²+12n+8
coba periksa lagii !!