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: a) ( x^2 – 2x +2)(x – 2) (x^2 + 2x+2)(x +2)

Toán Lớp 8: a) ( x^2 – 2x +2)(x – 2) (x^2 + 2x+2)(x +2)

Comments ( 2 )

  1. Giải đáp:
    a) ( x^2 – 2x +2)(x – 2) (x^2 + 2x+2)(x +2)
    ={ [ (x^2 +2)-2x ]. [(x^2 +2)+2x ]}. [(x-2).(x+2)]
    = [ (x^2+2)^2 – 4x^2] . ( x^2 -4)
    = (x^4 + 4x^2 +4 – 4x^2) . ( x^2 -4)
    = (x^4 +4).(x^2 -4)
     

  2. Giải đáp+Lời giải và giải thích chi tiết:
     $a)(x^2-2x+2)(x-2)(x^2+2x+2)(x+2)\\=[(x^2-2x+2)(x^2+2x+2)][(x-2)(x+2)]\\=[(x^2+2)^2-4x^2](x^2-4)\\=(x^4+4x^2+4-4x^2)(x^2-4)\\=(x^4+4)(x^2-4)\\=x^6-4x^4+4x^2-16$

Leave a reply

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

About Mai