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

Toán Lớp 8: 6x^2-12/6 rút gọn , help :((((((((

Toán Lớp 8: 6x^2-12/6 rút gọn , help :((((((((

Comments ( 2 )

  1. \frac{6x^2 – 12}{6}
    = \frac{6(x^2 – 2)}{6}
    = x^2 – 2
    = (x – \sqrt{2} )( x + \sqrt{2} )
    Áp dụng
    – Đặt nhân tử chung
    – HĐT : a^2 – b^2 = (a-b)(a+b)

  2. 6x^2-12/6
    = $\dfrac{6(x^2-2)}{6}$ 
    =x^2-2
    = (x-$\sqrt[n]{2}$ ).(x + $\sqrt[n]{2}$)
    @thew
     

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

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