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

Toán Lớp 9: x + 2 căn x + 1 e) x -5 căn x + 6 gappppppppppppppppppp

Toán Lớp 9: x + 2 căn x + 1
e) x -5 căn x + 6 gappppppppppppppppppp

Comments ( 2 )

  1. $x$ $+$ $2\sqrt{x}$ $+$ $1$ 
    $=$ $(\sqrt{x}+1)^{2}$ 
    $x-$  $5\sqrt{x}+6$ 
    $=$ $x-$  $3\sqrt{x}$  $-$ $2\sqrt{x}$ + $6$
    $=$ $\sqrt{x}$ ($\sqrt{x}$  $-$ $3$) $-$ $2$($\sqrt{x}$  $-$ $3$ ) 
     $=$ ($\sqrt{x}$ $-$ $3$) ( $\sqrt{x}$ $-$ $2$)

  2. Giải đáp:
     a. $(\sqrt{x}+1)²$
    b. $(\sqrt{x}+1).(x-6)$
    Lời giải và giải thích chi tiết:
     $a.x+2\sqrt{x}+1$
    $=(\sqrt{x})²+2.\sqrt{x}.1+1²$
    $=(\sqrt{x}+1)²$
    $b.x-5\sqrt{x}+6$
    $=x+\sqrt{x}-6\sqrt{x}+6$$=x.(\sqrt{x}+1)-6.(\sqrt{x}+1)$
    $=(\sqrt{x}+1).(x-6)$

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

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