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: Làm tính nhân:(2x-1)(x^2+2x+3)

Toán Lớp 8: Làm tính nhân:(2x-1)(x^2+2x+3)

Comments ( 2 )

  1. $@Shinn$
    (2x-1)(x²+2x+3)
    =2x³+4x²+6x-x²-2x-3
    =2x³+3x²+4x-3
    → Nhân (a+b)(c+d)=a.c+a.d+b.c+c.d
     

  2. Giải đáp:
     (2x – 1)(x² + 2x + 3)
    = 2x.x² + 2x.2x +2x.3 + (-1).x² + (-1).2x + (-1).3
    = 2x³ + 4x² + 6x – x² – 2x – 3
    = 2x³ + 3x² + 4x – 3
     

Leave a reply

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