-3/7. 5/9 + 4/9 . -3/7 +(-2022)⁰ 
= -3/7 . ( 5/9 + 4/9) + 1
= -3/7 . 1 + 7/7
= -3/7 + 7/7
= 4/7

`3) [-3] / 7 . 5 / 9 + 4 / 9 . [-3] / 7 + (-2022)^0`

`=[-3] / 7 ( 5 / 9 + 4 / 9 ) + 1`

`=[-3] / 7 . 9 / 9 + 1 `

`=[-3] / 7 + 1`

`=[-3] / 7 + (7) / 7`

`= [4 ]/ 7`

1

= 0.75 - ( 7/3 + 3/4) + 3². (-1/9)

= 3/4 - 37/12 + 9 . (-1/9)

= 3/4 - 37/12 + -1

= -10/3

thanks

\(0,75-\left(\dfrac{7}{3}+0,75\right)+9.\left(-\dfrac{1}{9}\right)\)

\(\dfrac{3}{4}-\left(\dfrac{7}{3}+\dfrac{3}{4}\right)+\dfrac{9}{1}.\left(-\dfrac{1}{9}\right)\)

\(\dfrac{3}{4}-\left(\dfrac{28}{12}+\dfrac{9}{12}\right)+\left(-\dfrac{9}{9}\right)\)

\(\dfrac{3}{4}-\dfrac{37}{12}+\left(-1\right)\)

\(\dfrac{9}{12}-\dfrac{37}{12}+\left(-1\right)\)

\(-\dfrac{28}{12}+\left(-\dfrac{12}{12}\right)\)

\(-\dfrac{40}{12}\)

\(=2\dfrac{6}{7}.\left[\left(\dfrac{-7}{5}-\dfrac{6}{5}\right)+\left(\dfrac{3}{2}\right)^2\right]\)

\(=2\dfrac{6}{7}.\left[\dfrac{-13}{5}+\dfrac{9}{4}\right]\)

\(=2\dfrac{6}{7}.\dfrac{-7}{20}\)

=\(=\dfrac{20}{7}.\dfrac{-17}{20}=\dfrac{-17}{7}\)

\(2\dfrac{6}{7}.\left[\left(\dfrac{-7}{5}-\dfrac{3}{2}:\dfrac{-5}{-4}\right)+\left(\dfrac{3}{2}\right)^2\right]\\=\dfrac{20}{7}.\left(\dfrac{6}{5}+\dfrac{9}{4}\right)\\ =\dfrac{20}{7}.\dfrac{69}{20}\\ =\dfrac{69}{7}\)

Rút gọn

14/70 = 14:7/70:7 = 2/10

AI CHOI FF KO KB V MIK

what your name?

Đáp án là C

Đáp án là B

Quá trình phân giải prôtêin từ xác động vật, thực vật tạo thành NH₃ của các vi sinh vật đất theo các bước sau: Prôtêin → pôlipeptit → peptit → axit amin → NH₂ → NH₃

Đáp án: A

=2(2x^3-3x^2+3x-1)

=2(2x^3-x^2-2x^2+x+2x-1)

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