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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: PTĐTTNT : 28a2b2 – 21ab2 + 14a2b

Toán Lớp 8: PTĐTTNT : 28a2b2 – 21ab2 + 14a2b

Comments ( 2 )

  1. 28a^2b^2-21ab^2+14a^2b
    =7ab(4ab-3b+2a)

  2. 28a^2b^2-21ab^2+14a^2b
    =7ab(4ab-3b+2a)
    -> Đặt nhân tử chung :7ab

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222-9+11+12:2*14+14 = ? ( )

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