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= 4m - 6m -5 +8
= -2m + 3
2. 9p2 - 4 pq - q2 - 4p2 +5pq - 3q2
= 9p2- 4p2 -4pq + 4pq - 3q2 - q2
= 5p2 - pq - 2q2
3. 2(-8a-3b) -4a + 9b
= -16a - 6b -4a + 9b
= -16b + 9b -6a - 4a
= 7b -10a
Selanjutnya kerjakan sesuai dengan jalan yg diatas ya:)
b 5p^2+pq-4q^2
c -20a+3b
d -3x^3-2x^2-3
e. -30k^2l-17kl^2
f 13m^3-9m^2-13m
( ^ maksudnya pangkt ya, gbs nulis pangkat soalnya hehe)