2(ichi)

ichi+ich=ni

Nghĩ  trong tiếng Nhật là 1+1=2

2 vị trí

cac ban giai dum minh nha

4730ta=437tan

4370 tạ=437 tấn 0 tạ

Nha bạn

1. A letter is read by Peter.

2. All the books in the shop were sold.

3. The words are explained by teacher today.

4. A new restaurant will be opened next week.

5. The lessons were prepared carefully.

1.read

2.were sold

3.are explain

4.will be

5.were prepared

Chuc ban hk tốt hơn!

nhân chéo chia ngang

x= -7*36/12=-21

muốn chắc chắn thì thử lại

\(\frac{-7}{12}=\frac{21}{36}\)theo quy đồng cũng đúng

Viết lại là:

\(\frac{-7}{12}=\frac{x}{36}\)

=> \(-7.36=12.x\)

=> \(-252=12.x\)

=> \(x=\frac{-252}{12}\)

=> \(x=-21\)

4x²-7x+3=0

4x²-4x-3x+3=0

4x(x-1)-3(x-1)=0

(x-1)(4x-3)=0

+) x-1=0

x=1 (loại)

+) 4x-3=0

x=3/4 (chọn)

2x.(x - 5) - x.(3 + 2x) = 26

=> (2x² - 10x) - (3x + 2x²) = 26

=> 2x² - 10x - 3x - 2x² = 26

=> -13x = 26

=> x = 26 : (-13)

=> x = -2

2x.﴾x ‐ 5﴿ ‐ x.﴾3 + 2x﴿ = 26 => ﴾2x 2 ‐ 10x﴿ ‐ ﴾3x + 2x 2 ﴿ = 26 => 2x 2 ‐ 10x ‐ 3x ‐ 2x 2 = 26 => ‐13x = 26 => x = 26 : ﴾‐13﴿ => x = ‐2

7km²8m²9cm² = 7000008,0009m2

`7 km^2 8 m^2 9cm^2 = 7xx1000000+8+9xx1/10000=7000008,0009 m^2`

\(x^3+y^3+72=x^3+y^3+3x^2y+3xy^2-3x^2y-3xy^2+72\)

\(=\left(x+y\right)^3-3xy\left(x+y\right)+72\)

\(=14^3-3.48.14+72=800\)