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

Toán Lớp 9: Rút gọn P= √x-2√x-1+ √x+2√x-1 với 1≤x<2

Toán Lớp 9: Rút gọn P= √x-2√x-1+ √x+2√x-1 với 1≤x<2

Comments ( 1 )

  1. $P=\sqrt{x}-2\sqrt{x}-1+\sqrt{x}+2\sqrt{x}-1$ $;(1≤x<2)$ 
    $=\sqrt{x}-2\sqrt{x}+\sqrt{x}+2\sqrt{x}-1-1$
    $=2\sqrt{x}-1-1$
    $=2\sqrt{x}-2$
     

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