Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 7: Tìm m ạ a1) 7x^2y^3+8x^2 y^3-2x^2 y^3+M=10x^2 y^3 a2) 7/2 x^3 y^3-M=2/3 x^3 y^5-2x^3 y^5 a3) M-(7/3 x^2 y^5 -5/2 x^2 y^5)-2/3x^2 y^5=-x

Tháng Mười Một 20, 2022 Toán học 1 Comment 0 views

Toán Lớp 7: Tìm m ạ
a1) 7x^2y^3+8x^2 y^3-2x^2 y^3+M=10x^2 y^3
a2) 7/2 x^3 y^3-M=2/3 x^3 y^5-2x^3 y^5
a3) M-(7/3 x^2 y^5 -5/2 x^2 y^5)-2/3x^2 y^5=-x^2 y^5
a4) -4/3x^2 y^7-5/2x^2 y^7-4x^2 y^7=2/3 x^2 y^7-M
Làm hộ mình càng nhiều càng tốt ạ. Ít nhất 2 phần đc không ạ? :(( Hứa cho 5* và ctlhn :>

Comments ( 1 )

  1. tuyetnhungthu
    tuyetnhungthu
    20 Tháng Mười Một, 2022 at 1:46 chiều
    Reply
    a_1
    7x^2 y^3 + 8x^2 y^3 – 2x^2 y^3 + M = 10x^2 y^3
    => M = 10x^2 y^3 – (7x^2 y^3 + 8x^2 y^3 – 2x^2 y^3)
    => M = 10x^2 y^3 – 7x^2 y^3 – 8x^2 y^3 + 2 x^2 y^3
    => M = -3 x^2 y^3
    Vậy M = -3x^2y^3
    a_2
    7/2 x^3 y^3 – M = 2/3 x^3 y^5 – 2 x^3 y^5
    => M = 7/2x^3 y^3 – (2/3 x^3 y^5 – 2 x^3 y^5)
    => M = 7/2 x^3 y^3 – 4/3 x^3 y^5
    Vậy M = 7/2 x^3 y^3 – 4/3 x^3 y^5
    7/2 x^3 y^5 – M = 2/3 x^3 y^5 – 2 x^3 y^5
    => M = 7/2x^3 y^5 – (2/3 x^3 y^5 – 2 x^3 y^5)
    => M = 7/2 x^3 y^5 – 2/3 x^3 y^5 + 2 x^3 y^5
    => M = 29/6 x^3 y^5
    Vậy M = 29/6 x^3 y^5
    a_3
    M-  (7/3 x^2 y^5 – 5/2 x^2 y^5) – 2/3 x^2 y^5 = – x^2 y^5
    => M = – x^2 y^5 + 2/3 x^2 y^5 + (7/3 x^2 y^5 – 5/2 x^2 y^5)
    => M = – x^2 y^5 + 2/3 x^2 y^5 + 7/3 x^2 y^5 – 5/2 x^2 y^5
    => M = -1/2 x^2 y^5
    Vậy M = -1/2 x^2 y^5
    a_4
    -4/3 x^2 y^7 – 5/2 x^2 y^7 – 4x^2 y^7 = 2/3 x^2 y^7 – M
    => M = 2/3 x^2 y^7 – (-4/3 x^2 y^7 – 5/2 x^2 y^7 – 4x^2 y^7)
    => M = 2/3 x^2 y^7 + 4/3 x^2 y^7 + 5/2 x^2 y^7 + 4 x^2 y^7
    => M = 17/2 x^2 y^7
    Vậy M = 17/2 x^2 y^7

Leave a reply

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

Trang Ðài

About Trang Ðài