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

Toán Lớp 9: √x^8.(2-x)^2 giúp vs ạ giải chi tiết

Toán Lớp 9: √x^8.(2-x)^2 giúp vs ạ giải chi tiết

Comments ( 2 )

  1. \sqrt{x^8(2-x)^2]
    =\sqrt{[x^4(2-x)]^2]
    =|x^4(2-x)|
    =x^4|2-x|

  2. $\sqrt{x^8(2-x)^2}$
    $= |x^4|.|(2-x)|$
    $=x^4 .(2-x)$
    $=2x^4 – x^5$

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