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2. pq pangkat dua + 6pq - p - 5
3. x pangkat dua - y - 4x - 4
#maafklausalah
2y-x = -x+2y
-------- -
6x-(-x)-3y-2y = 7x-5y
2. 7pq²+4pq-p
-6pq²+2pq-5
----------------- -
7pq²-(-6pq²)+4pq-2pq-p-(-5) = 13pq²+2pq-p+5
3. x²-2y - y-4x - 2y-4 = x²-2y-y-2y-4x-4
= x²-5y-4x-4
maaf ya kalo salah._.