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: 1.Thực hiện phép nhân 1 ) 3????^4(−2????^3+5x^2-2/3x+1/3 ) 2 ) − 5????^2????^4 ( 3????^2y^3 − 2????^3????^2 −xy) 3/ ( −5???? + 2 )( −3???? − 4 ) 4/ ( �

Home/ Toán Lớp 8: 1.Thực hiện phép nhân 1 ) 3????^4(−2????^3+5x^2-2/3x+1/3 ) 2 ) − 5????^2????^4 ( 3????^2y^3 − 2????^3????^2 −xy) 3/ ( −5???? + 2 )( −3???? − 4 ) 4/ ( �

Toán Lớp 8: 1.Thực hiện phép nhân 1 ) 3????^4(−2????^3+5x^2-2/3x+1/3 ) 2 ) − 5????^2????^4 ( 3????^2y^3 − 2????^3????^2 −xy) 3/ ( −5???? + 2 )( −3???? − 4 ) 4/ ( �

Tháng Sáu 5, 2022 Toán học 1 Comment 0 views

Toán Lớp 8: 1.Thực hiện phép nhân
1 ) 3????^4(−2????^3+5x^2-2/3x+1/3 )
2 ) − 5????^2????^4 ( 3????^2y^3 − 2????^3????^2 −xy)
3/ ( −5???? + 2 )( −3???? − 4 )
4/ ( ???? − 5 )( −????^2 + ???? + 1 )
5/ ( ????^2 − 2???? − 1 )( ???? − 3 )

Comments ( 1 )

  1. dananhthumai
    dananhthumai
    5 Tháng Sáu, 2022 at 4:48 chiều
    Reply
    1) $ 3x^4 ( – 2x^3 + 5x^2 – \dfrac{2}{3} x + \dfrac{1}{3} ) $
    $ = – 6x^7 + 15x^6 – 2x^5 + x^4 $
    2) $ – 5x^2y^4 ( 3x^2y^3 – 2x^3y^2 – xy ) $
    $ = -15x^4y^7 + 10x^3y^6 + 5x^3y^5 $
    3) $ ( – 5x + 2 ) ( -3x – 4 ) $
    $ = 15x^2 -6x + 20x – 8 $
    $ = 15x^2 + 14x – 8 $
    4) $ ( x – 5 ) ( -x^2+ x + 1 ) $
    $ = -x^3 + 5x^2 + x^2 – 5x + x – 5 $
    $ = -x^3 + 6x^2 -4x – 5 $
    5) $ ( x^2 – 2x – 1 ) ( x – 3 ) $
    $ = x^3 – 2x^2 – x – 3x^2 + 6x + 3 $
    $ = x^3 – 5x^2 + 5x + 3 $
     

Leave a reply

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

Chi Mai

About Chi Mai