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

Toán Lớp 9: √X +3 / √x + 1 – 5/ 1 – √x + 4/ x – 1 rút gon lẹ vs

Toán Lớp 9: √X +3 / √x + 1 – 5/ 1 – √x + 4/ x – 1 rút gon lẹ vs

Comments ( 2 )

  1. Giải đáp + Lời giải và giải thích chi tiết:
    (\sqrtx+3)/(\sqrtx+1)-5/(1-\sqrtx)+4/(x-1)(x\ge0;x\ne1)
    =(\sqrtx+3)/(\sqrtx+1)+5/(\sqrtx-1)+4/(x-1)
    =((\sqrtx+3)(\sqrtx-1))/(x-1)+(5(\sqrtx+1))/(x-1)+4/(x-1)
    =(x+2\sqrtx-3+5\sqrtx+5+4)/(x-1)
    =(x+7\sqrtx+6)/(x-1)
    =(x+\sqrtx+6\sqrtx+6)/(x-1)
    =(\sqrtx(\sqrtx+1)+6(\sqrtx+1))/(x-1)
    =((\sqrtx+1)(\sqrtx+6))/((\sqrtx+1)(\sqrtx-1))
    =(\sqrtx+6)/(\sqrtx-1)
     

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