Floods and storms are common natural disasters in VietNam, particularly in the central coastal regions. Every year, from June to November, the country faces numerous typhoons that bring heavy rainfall and strong winds. These disasters cause severe damage to infrastructure, destroy crops, and lead to significant loss of life. High water levels often submerge houses and isolate entire communities. To minimize the impact, the government and local people focus on building resilient houses, improving warning systems, and planting mangroves. Despite these efforts, floods remain a serious challenge for the nation's development

1. He asked the villagers how often earthquakes occurred in that region

2. They told me that I could find a wide range of beauty products in their store

1. I think robots can't replace the role of teachers in education

2. Will people still send letters to each other in 2025?

a) Thể tích tính hình hộp chữ nhật là:

V=x. (x+1).(x-1)

= x.(x^2 - x + x -1) = x.(x^2-1)

=x^3 - x

b) Thể tích của hình hộp chữ nhật tại x=4

V(4)=4.^3 - 4

=64 -4

=60

Thương: 2x^2 - 3x + 1

Dư:0

X= -36

a) P(x)+Q(x)= -5x^3 + 3x^2 + 6x - 4

R(x)= 2x^4 - 5x^3 - 3x^2 + 2x - 6