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

Toán Lớp 8: 1). 1/25-4/36x^2 2). x^2/25 – a^2/36

Toán Lớp 8: 1). 1/25-4/36x^2
2). x^2/25 – a^2/36

Comments ( 2 )

  1. Giải đáp+Lời giải và giải thích chi tiết:
    1)
    1/(25)-(4x^2)/(36)
    =(1/(5))^2-((2x)/(6))^2
    =(1/5-(2x)/(6))(1/5+(2x)/(6))
    2)
    (x^2)/(25)-(a^2)/(36)
    =((x)/(5))^2-((a)/(6))^2
    =((x)/(5)-(a)/(6))((x)/(5)+(a)/(6))

  2. 1)1/25-4/36x^2
    =(1/5)^2-(2/6x)^2
    =(1/5-2/6x)(1/5+2/6x)
    2)(x^2)/25-(a^2)/36
    =(x/5)^2-(a/6)^2
    =(x/5-a/6)(x/5+a/6)
    $\text{@ThanhTruc2008}$

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

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