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 8: rút gọn -(x-3)(X^2-2x+5)-x(x+1)(1-x)

Tháng Sáu 17, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: rút gọn -(x-3)(X^2-2x+5)-x(x+1)(1-x)

Comments ( 2 )

  1. hoaiphuong85
    hoaiphuong85
    17 Tháng Sáu, 2022 at 10:59 chiều
    Reply
    -(x-3)(x^2-2x+5)-x(x+1)(1-x)
    =(-x+3)(x^2-2x+5)-x(x+1)(1-x)
    =-x^3+5x^2-11x+15 -(x^2+x)(1-x)
    =-x^3+5x^2-11x+15+x^3-x
    =5x^2-11x+15-x
    =5x^2-12x+15

  2. tuyetnhungthu
    tuyetnhungthu
    17 Tháng Sáu, 2022 at 10:59 chiều
    Reply
    -(x-3)(x^2-2x+5)-x(x+1)(1-x)
    =(3-x)(x^2-2x+5)-(x^2+x)(1-x)
    =3x^2-6x+15-x^3+2x^2-5x-(x^2-x^3+x-x^2)
    =5x^2-11x+15-x^3+x^3-x
    =5x^2-12x+15
     

Leave a reply

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

Trang Ðài

About Trang Ðài