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

Toán Lớp 8: lm cho tui Tìm x biết `( 2^4 – 3^3 + x^2 ) : ( -1/2x^2) + 4 ( x – 1 )^2 =0`

Toán Lớp 8: lm cho tui
Tìm x biết ( 2^4 – 3^3 + x^2 ) : ( -1/2x^2) + 4 ( x – 1 )^2 =0

Comments ( 2 )

  1. $#Corn gửi bạn nguyenkhanhanh2009 $
    $#Chúc bạn học tốt $
    @Phương
    text{Ta có }
    ( 2x^4 – 3^3 + x^2 ) : ( -1/2x^2 ) + 4 ( x – 1 )^2 = 0
    <=> 2x^4 : ( -1/2x^2 )  – 3x^2 : ( -1/2x^2 ) + x^2 : ( -1/2x^2 )  + 4 ( x^2 – 2x +1  ) = 0
    <=> – 4x^2 + 6x – 2 + 4x^2 – 8x +4 = 0
    <=>-2x + 2 = 0
    <=> x = 1

  2. (2^4-3^2+x^2):(-1/2x^2)+4(x-1)^2=0
    <=>[2x^4:(-1/2x^2)]-[3x^2:(-1/2×2)]+[x^2:(-1/2x^2)]+4(x-1)^2=0
    <=>-4x^2+6x-2+4x^2-8x+4=0
    <=>-2x+2=0
    <=>-2x=-2
    <=>x=1
    Vậy x=1
     

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