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

Toán Lớp 8: Rút gọn: M = $\frac{12x – 15}{x^2 – 7x + 12}$ – $\frac{x + 5}{x – 4}$ – $\frac{2x + 3}{x – 3}$

Home/ Toán Lớp 8: Rút gọn: M = $\frac{12x – 15}{x^2 – 7x + 12}$ – $\frac{x + 5}{x – 4}$ – $\frac{2x + 3}{x – 3}$

Toán Lớp 8: Rút gọn: M = $\frac{12x – 15}{x^2 – 7x + 12}$ – $\frac{x + 5}{x – 4}$ – $\frac{2x + 3}{x – 3}$

Tháng Tám 10, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: Rút gọn:
M = $\frac{12x – 15}{x^2 – 7x + 12}$ – $\frac{x + 5}{x – 4}$ – $\frac{2x + 3}{x – 3}$

Comments ( 2 )

  1. ngoclanquynh
    ngoclanquynh
    10 Tháng Tám, 2022 at 6:40 sáng
    Reply
    ~ Bạn tham khảo ~
    M = [12x-15]/[x^2-7x+12] – [x+5]/[x-4] – [2x+3]/[x-3]
    ĐKXĐ : x\ne3;4
    <=> M = [12x-15]/[x^2-3x-4x+12] – [x+5]/[x-4] – [2x+3]/[x-3]
    <=> M = [12x-15]/[x(x-3)-4(x-3)] – [x+5]/[x-4] – [2x+3]/[x-3]
    <=> M = [12x-15]/[(x-3)(x-4)] – [(x+5)(x-3)]/[(x-3)(x-4)] – [(2x+3)(x-4)]/[(x-3)(x-4)]
    <=> M = [12x-15 – x^2 – 2x + 15 – 2x^2 + 5x + 12]/[(x-3)(x-4)]
    <=> M = [-3x^2+15x+12]/[(x-3)(x-4)]

  2. danvanthu
    danvanthu
    10 Tháng Tám, 2022 at 6:40 sáng
    Reply
    Mình dùng chuột viết nên hơi xấu mong bạn thông cảm!
    Chúc bạn học tốt!

    toan-lop-8-rut-gon-m-frac-12-15-2-7-12-frac-5-4-frac-2-3-3

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

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