A= (3x^2/x^2-1 - 2/x-1 - 2/x+1) : ( 1 - x/x+1)
rút gọn A
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1.How many books does she have?
2.There is a big pond and a garden.
3.She has three toys.
4.It is sunny and hot in Hanoi today.
5.I do not have any toys and pets.
6.How may wardrobes are there?
7.Do you have a big cat?
1. How many red books does she have ?
2. There is a big garden and a pond .
3. She has three toys.
4. Ha Noi in sunny and it is hot today