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=(4 - 2)a + 12ab + 10b
=(-5)+ 12ab + 10b
(b.)5p - 6pq -7p² +16pq + 8p
=7p²- (6 + 16)pq - (5 + 8)p
=7p²- 22pq - 13p
(c.)7m² + 8m + 6 - 9m² - 2m + 10
=(7 - 9)m² +(8 - 2)m + 6 + 10
=(-2)m² + 6m + 16
(d.)3x²y - 2xy + 7x²y - 4xy² -8xy
=(3 - 7)x²y - 4xy² - (2 - 8)xy
=(-4)x²y - 4xy² - (-6)xy
Maaf kalau salah,kalau saya slah tlng bilang/ dibenarkan,nomor 2 saya kurang ngerti jd saya bantu jwb nomor 1 saja...