Olm chào em, cảm ơn đánh giá của em về chất lượng bài giảng của Olm, cảm ơn em đã đồng hành cùng Olm trên hành trình tri thức. Chúc em học tập hiệu quả và vui vẻ cùng Olm em nhé!

đenta lớn hơn 0

\

Để phương trình bậc hai \(ax^2+bx+c=0\) có hai nghiệm phân biệt thì Δ>0

=>\(b^2-4ac>0\)

(-62 + 81) + 62

= - 62 + 81 + 62

= (-62 + 62) + 81

= 0 + 81

= 81

Cứu tui 8-2+3=9 hay bằng 3

Olm chào em, cảm ơn đánh giá của em về chất lượng bài giảng của Olm, cảm ơn em đã đồng hành cùng Olm trên hành trình tri thức. Chúc em học tập hiệu quả và vui vẻ cùng Olm em nhé!

\(x.y=7\) (\(x;y\) ∈ Z)

Ư(7) = {-7; -1; 1; 7}

Lập bảng ta có:

Theo bảng trên ta có: (\(x;y\)) = (-1; -7); (-7;-1); (7; 1); (1; 7)

Kết luận: Các cặp số nguyên thỏa mãn đề bài là:

(-1; -7); (-7;-1); (7; 1); (1; 7)

Tự làm đi 👽

bothay

“If your prediction is wrong, you make a new hypothesis.”

1. What colour is her ruler?

2. My pencil is orange.

3. What colour are the pens?

• 1,What colour is her ruler?
• 2,My pencil is orange.
  3,What colour are the pens?
  

WATH

lndividuals can reduce pollution by following the 3Rs : reduce , reuse , and recycle . Using public transport instead of cars helps decrease air emissions . We also save energy by turning off lights and using efficient appliances . these steps make a big difference

1. I usually walk around, relax, and play sports with my friends at the park.

2. I turn off the lights and fans when I don’t need them and unplug chargers when they are not in use.

3. I throw rubbish in the bin, recycle plastic bottles, and try to use reusable bags.

4. I like to play badminton because it’s fun and helps me stay healthy.

5. I usually eat bread, eggs, or noodles for breakfast.

1. I usually walk, play with my friends, and enjoy the fresh air.

2. I turn off the lights and unplug devices when I don’t use them.

3. I recycle, don’t litter, and save water and electricity.

4. I like to play football because it is fun and keeps me healthy.

5. I usually eat bread, eggs, and drink milk for breakfast.

Topic 1:

During an earthquake, we should stay calm and quickly find a safe place to hide, such as under a strong table or next to a wall. We must protect our head and avoid running outside because falling objects can be dangerous. We shouldn’t use elevators or stand near windows. After the shaking stops, we should move to an open area and wait for help.

• I usually walk, play with my friends, and enjoy the fresh air.
• I turn off the lights and unplug devices when I don’t use them.
• I recycle, don’t litter, and save water and electricity.
• I like to play football because it is fun and keeps me healthy.
• I usually eat bread, eggs, and drink milk for breakfast.