May 2020 1 228 Report
1. kurangkanlah (2a² + 3b² + 4c²) dan hasil jumlah a² + 4ab - 3b², ab - 4b² + 3a², dan b² + 4a² - 23a.

2. Sederhanakanlah!
(a+b-c) - (1/3a - 1/5b + 1/4c) - (-1 1/3a + 1 1/4b - 4/5c)

plis kak bantuin
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