Giải phương trình:

\(\sqrt{5x-1}-\sqrt{3x-2}=\sqrt{x-1}\)

Cho biểu thức :A=\(\left(\dfrac{a\sqrt{a}-1}{a-\sqrt{a}}-\dfrac{a\sqrt{a}+1}{a+\sqrt{a}}\right):\dfrac{a+2}{a-2}\)

a)Với những giá trị nào của a thì A xác định

b)Rút gọn

C)Với những giá trị nguyên nào của a thì A có giá trị nguyên

Tìm các giá trị của a và b để hệ thức \(H_{\left(x\right)}=ax^3+\left(a+1\right)x^2-\left(4b+3\right)x+5b\) đồng thời chia hết cho x-1 và x+2

Tìm và sửa lỗi sai:

1.This arrangement will be of great benefit with you both

2.We will immediately inform you with any changes to the programs

1.The prices at this store are very high,don't you think?

->I think that

2.You will support me at the meeting,won't you (BACK)

->You will.................at the meeting won't you?

3.This form must be complete before you leave(FILL)

->You..............................this form before you leave

4.I don't think I'll go out on S(Stay)

->I think................on S

5.Unless it stops raining soon,we'll have to cancel the picnic (CLEAR)

->if it......................soon,we'll have to cancel the picnic

6.I don't smoke as many cigarettes as I used to (Cut)

->I've managed to................cigarettes I smoke

Viết lại câu với từ cho sẵn:

1.I don't like disturbing her when she is busy (intruding)

2.The profit that might be made is enormous (potential)

3.I don't think I'll see him for some time (Anticipate)

Viết lại câu:

1.If you gave your mind to your work,you might not make so many mistakes (CONCENTRATED)

2.You'll have to start doing some serious work soon (get)