November 2018 1 34 Report
Kurangkanlah :
1. a + b dari 2a + 3b
2. 2a + 3b dari a + b
3. x kuadrat + 2x - 1 dari -5x kuadrat +4x +10
4. 21 - 5a +7a kuadrat dari -24 + 21a - 8a kuadrat

( Tolong dijawab kalo bisa dikasih caranya, soalnya ada 5. )
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