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

Toán Lớp 9: Cho biểu thứ A= $\frac{x+5 √x}{x-25}$ Tìm x để A=0

Toán Lớp 9: Cho biểu thứ A= $\frac{x+5 √x}{x-25}$
Tìm x để A=0

Comments ( 2 )

  1. A=(x+5\sqrt{x})/(x-25) (x>=0,xne25)
    A=(\sqrt{x}(\sqrt{x}+5))/((\sqrt{x}-5)(\sqrt{x}+5))
    A=\sqrt{x}/(\sqrt{x}-5)
    Để A=0
    <=>(\sqrt{x})/(\sqrt{x}-5)=0
    <=>\sqrt{x}=0
    <=>x=0 ™
    Vậy A=0<=>x=0
     

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