a) (6x3 + 3x2 + 4x + 2) : (3x2 + 2)
b) (2x3 - 27x2 + 115x - 150) : (x - 5)
c) (12x4 + 4x3 + 9x + 3) : (3x - 2)
d) (x5 + 4x3 + 3x2 - 5x + 15) : (x3 - x + 3)
e) (3x5 - x4 - 2x3 + x2 + 5) : (x2 - 2x + 2)
g) (2x4 - 11x3 + 19x2 - 20x + 9) : (x2 - 4x + 1)
Phân tích đa thức thành nhân tử:
a) x3 + x + 2
b) x3 - x - 2
c) x3 + 32x - 4
d) x3y3 + x2y2 + 4
e) x3 + 3x2y - 9xy2 + 5y3
g) x4 + x3 + 6x2 + 5x + 5
h) x4 - 2x3 - 12x2 + 12x + 36
i) x8y8 + x4y4 + 1
k) x5 - x4 + x3 - x2 + x + 1
l) x5 + x4 - x3 + x2 - x + 2
Tìm x, y thuộc Z để:
a) xy + x - y = 2
b) x - 2xy + y = 0
c) x. (x - 2) - (2 - x)y - 2. (x - 2) = 3
d) (2x - y). (4x2 + 2xy + y2) + (2x + y). (4x2 - 2xy + y2) - 16x. (x2 - y) = 32
e) x2 - 2xy + 2y2 - 2x + 6y +5 = 0
g) x2 + 2xy + 7x + 7y + 2y2 = 0
Complete the second sentence so that it has a similar meaning to the first one.
1. Our new house is bigger and more comfortable than the old one.
Our old house is not ……………………………………...........
2. I don’t like coffee and my sister doesn’t, either.
I don’t like coffee and neither…………………………………..
3. They have just sent an ambulance to the school.
An ambulance …………………………………….....................
4.“There are flights from Nha Trang to Ha Noi twice a week,” they said to me.
They told me …………………………………………………...
5. Please don’t interrupt me while I am speaking.
I’d rather ……………………………………..............................