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

Toán Lớp 8: TÌM x : (x – 4)x – (x -3)² = 0 HELPPP , THANKSS Ạ

Toán Lớp 8: TÌM x :
(x – 4)x – (x -3)² = 0
HELPPP , THANKSS Ạ

Comments ( 2 )

  1. Bạn tham khảo nhé.
    (x-4).x-(x-3)^2=0
    <=>x^2-4x-(x^2-2.3.x+3^2)=0
    <=>x^2-4x-x^2+6x-9=0
    <=>2x=9
    <=>x=9/2
    Vậy x=9/2

  2.        (x-4)x-(x-3)^2=0
    ⇔ x^2-4x-(x^2-6x+9)=0
    ⇔ x^2-4x-x^2+6x-9=0
    ⇔ 2x-9=0
    ⇔ 2x=9
    Vậy x=9/2=4,5
    Chúc bạn học tốt, cho mình câu trả lời hay nhất + 5* + cám ơn nha!!!

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

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