Câu trả lời:
a)x3+4x2−7x−10=x3+x2+3x2+3x−10x−10=x2(x+1)+3x(x+1)−10(x+1)�3+4�2−7�−10=�3+�2+3�2+3�−10�−10=�2(�+1)+3�(�+1)−10(�+1)
=(x+1)(x2+3x−10)=(x+1)[(x2+5x)−(2x+10)]=(x+1)(x+5)(x−2)
Môn học
Chủ đề / Chương
Bài học
1. The painting is bigger than the photograph. (not as …as)
The photograph
.
2. They sell tickets at the gate of the tourist site.
Tickets
.
3. The market does not have any carrots.
There
.
4. They didn’t go camping yesterday because it rained heavily.
Because of
.
5. Be careful or you’ll hurt yourself.
If you are
.