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

Toán Lớp 8: (x+1/2)^2-(x+1/2)(x+6)=8 Giúp mik với, sắp nộp r????

Tháng Sáu 4, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: (x+1/2)^2-(x+1/2)(x+6)=8
Giúp mik với, sắp nộp r????

Comments ( 2 )

  1. ngochuong2k2
    ngochuong2k2
    4 Tháng Sáu, 2022 at 6:10 chiều
    Reply
    $*$Đáp$ $án:$
    $(x+1/2)^2-(x+1/2).(x+6)=8$
    $⇔ x^2+x+1/4-(x^2+6x+1/2x+3)=8$
    $⇔ x^2+x+1/4-x^2-13/2x-3=8$
    $⇔ (x^2-x^2)+(x-13/2x)+(1/4-3)=8$
    $⇔ -11/2x-11/4=8$
    $⇔ -11/2x=43/4$
    $⇔ x=-43/22$
    $Vậy$ $x=-43/22$
    $@Festivals$
     

  2. minhtuyethue
    minhtuyethue
    4 Tháng Sáu, 2022 at 6:10 chiều
    Reply
    ( x + 1/2 )^2 – ( x + 1/2 ) ( x + 6 ) = 8
    ( x + 1/2 ) ( x + 1/2 – x – 6 ) = 8
    ( x + 1/2 ) { – 11 }/2 = 8
      x + 1/2            = 8 : { – 11 }/2
      x                      = { – 16 }/11 – 1/2
      x                      = { – 43 }/22

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

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