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

Toán Lớp 9: a, (4×2 + 4xy + y2 ) : (2x+y) b, (27×3+1) : (3x+1) c, (x2 – 6xy + 9y2) : ( 3y-x) d, (8×3-1) : (4×2+2x+1)

Toán Lớp 9: a, (4×2 + 4xy + y2 ) : (2x+y)
b, (27×3+1) : (3x+1)
c, (x2 – 6xy + 9y2) : ( 3y-x)
d, (8×3-1) : (4×2+2x+1)

Comments ( 2 )

  1. a) (4×2+4xy+y2):(2x+y)=(2x+y)2:(2x+y)=2x+y
    b) 
    (27×3+1):(3x+1)=(3x+1)(9×2−9x+1):(3x+1)=9×2−9x+1
    c) (x2−6xy+9y2):(3y−x)
    =(x−3y)2:(3y−x)=(3y−x)2:(3y−x)=3y−x
    d) 
     

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