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-6a^2 + 8a
- 15y^3 + 10y^2 - 15y
ket : "^" dibaca "pangkat"
= 2a+6b+(10a-15b)
= 2a+6b+10a-15b
= 2a+10a+6b-15b = 12a - 9b.
2. 2a(-3a+4)
= -6a2+8a
3. 5y(-3y2+2y-3)
= -15y3+10y2-15y
#maaf hanya ini jawaban saya, semoga anda puas ;) !!! (y)