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

Toán Lớp 9: Tính A,(√3-√2)^2 B,(3√2-1)(3√2+1)

Toán Lớp 9: Tính
A,(√3-√2)^2
B,(3√2-1)(3√2+1)

Comments ( 2 )

  1. ~ Bạn tham khảo ~
    a,(sqrt(3)-sqrt(2))^2
    =(sqrt(3))^2-2sqrt(3)sqrt(2)+(sqrt(2))^2
    =3-2sqrt(6)+2
    =5-2sqrt(6)
    b,(3sqrt(2)-1)(3sqrt(2)+1)
    =(3sqrt(2))^2-1^2
    =9.2-1
    =18-1
    =17

  2. Bài làm :
    a,
    (\sqrt3-\sqrt2)^2
    =(\sqrt3)^2-2\sqrt3.\sqrt2+(\sqrt2)^2
    =3-2\sqrt6+2
    =5-2\sqrt6
    b,
    (3\sqrt2-1)(3\sqrt2+1)
    =(3\sqrt2)^2-1^2
    =18-1
    =17
     

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

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