Question 4. Give the correct form of the words given to complete the sentences:

1. The air in the city is very _____. (pollute)

2. We'll make thic beach clean and _____ again. (beaty)

3. If the pollution _____, what will happend. (continue)

4. The world's population is growing ____ .(quick)

5. if it doesn't rain soon, there'll be a great time _____ of water. (short)

6. In most big cities, there are many wealthy, but _____ is still a problem. (poor)

7. life must be ____ in the slums. (diffculty)

Tìm nghiệm của đa thức 3x\(^2\) - 9x

2

Tìm nghiệm của đa thức x\(^2\) + 4x

Bài 13. Cho 2 đa thức: P(x)= 4x2 + x3 - 2x +3 -x-x3 +3x -2x2

                                     Q(x)= 3x2 - 3x +2 -x3 +2x - x2

b)Tìm đa thức R(x) sao cho P(x) - Q(x) - R(x) =0