January 2019 1 21 Report
1.tentukan hasil penjumlahan
(13a-8b)+(21a+9b)
2.tentukan hasil pengurangan
(42n+35m+7)-(-50m-20n+9)
3.tentukan hasil pengurangan 6x + 4 oleh x-y
4.kurangkanlah
-x2 -6xy +3y2 dari 5x2-9xy-4y2

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