Quy đồng mẫu các phân thức sau: 1/(x^2+3x+2); 1/(x+1)^2; 1/(x+2)^2
Giải thích
MTC: (x+1)2(x+2)2
1x2+3x+2=x2+3x+2(x+1)2(x+2)2
1x+12=(x+2)2(x+1)2(x+2)2
1x+22=(x+1)2(x+1)2(x+2)2
MTC: (x+1)2(x+2)2
1x2+3x+2=x2+3x+2(x+1)2(x+2)2
1x+12=(x+2)2(x+1)2(x+2)2
1x+22=(x+1)2(x+1)2(x+2)2