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

Toán Lớp 8: `{24a^2 – 72a + 54}/{15a – 10a^2}`

Toán Lớp 8: {24a^2 – 72a + 54}/{15a – 10a^2}

Comments ( 2 )

  1. Giải đáp:
     $\dfrac{24a²-72a+54}{15a-10a²}$
    $= \dfrac{6.(4a²-12a+9)}{5a.(3-2a)}$
    $= \dfrac{6.(2a-3)²}{-5a.(2a-3)}$
    $= -\dfrac{6.(2a-3)}{5a}$
    $= -\dfrac{12a-18}{5a}$
     

  2. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-8-24a-2-72a-54-15a-10a-2

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