Phân tích mỗi đa thức sau thành nhân tử: a) 8x^3yz + 12x^2yz + 6xyz + yz;
Giải thích
a) 8x3yz+12x2yz+6xyz+yz=yz2x+13.
b) 81x4z2−y2−z2+y2=z−yz+y9x2+13x+13x−1.
c)x38−y327+x2−y3=x2−y3x24+xy6+y29+1.
d) x6+x4+x2y2+y4−y6=x2+y2+xyx2+y2−xyx2−y2+1.
a) 8x3yz+12x2yz+6xyz+yz=yz2x+13.
b) 81x4z2−y2−z2+y2=z−yz+y9x2+13x+13x−1.
c)x38−y327+x2−y3=x2−y3x24+xy6+y29+1.
d) x6+x4+x2y2+y4−y6=x2+y2+xyx2+y2−xyx2−y2+1.