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=(6-1)a³+(1+4)a
= 5a³+5a
2) k²-9k³+7k²-k³
=(1+7)k²+(-9-1)k³
= 8k²-10k³
3) m²-3m-2m³-3m²
=(1-3)m²-3m-2m³
= -2m²-3m-2m³
jadikan solusi terbaik yaa, thanks
2. -9k"'-k"'+k"+7k"= -10k"' + 8 k"
3. -2m"'+m"-3m"=-2m"'-2m"