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14 tháng 6 2020

 ❤♛ℳℴℴทℛเภz♕❤ Mỹ Ҩųƴềท ✫¸.•°*”˜˜”*°•✫ Ṱђầภ Ḉђết ✫•°*”˜˜”*°•.¸✫ Nguyễn Linh Chi zZz Cool Kid_new zZz Quỳnh Đào •๖ۣۜIηεqυαℓĭтĭεʂ•ッᶦᵈᵒᶫ★₤ŦŇŦ★ mọi người giúp em với ạ! Em cảm ơn

15 tháng 6 2020

\(ĐKXĐ:x\ne\pm\frac{3}{2}\)

Ta có phương trình tương đương với:

\(\frac{1}{\left(2z-3\right)^2}+\frac{3}{\left(3-2z\right)\left(3+2z\right)}=\frac{3}{\left(2z+3\right)^2}\)

\(\Leftrightarrow\frac{\left(2z+3\right)^2}{\left(2z+3\right)^2\left(2z-3\right)^2}+\frac{3\left(3-2z\right)\left(3+2z\right)}{\left(2z-3\right)^2\left(3+2z\right)^2}-\frac{3\left(2z-3\right)^2}{\left(2z+3\right)^2\left(2z-3\right)^2}=0\)

\(\Leftrightarrow4z^2+12z+9+3\left(9-4z^2\right)-3\left(4z^2+12z+9\right)=0\)

\(\Leftrightarrow\left(4z^2-12z^2-12z^2\right)+\left(12z-36z\right)+\left(9+27-27\right)=0\)

\(\Leftrightarrow-20z^2-24z+9=0\)

\(\Leftrightarrow\left(3z-10\right)\left(3z+2\right)=0\)

\(\Leftrightarrow z=\frac{10}{3}\) loại 1 nghiệm vì ĐKXĐ nhé !

Vậy z=10/3

19 tháng 6 2020

Ta có : \(3x=5y\)=> \(\frac{3x}{15}=\frac{5y}{15}\)=> \(\frac{x}{5}=\frac{y}{3}\)

Đặt \(\frac{x}{5}=\frac{y}{3}=k\)=> x = 5k,y = 3k

Do đó : 2x - 3y = 5 => 2.5k - 3.3k = 5

=> 10k - 9k = 5

=> k = 5

Vậy k = 5

Ơ... xem xét cái đề lại thử có đúng k ???

14 tháng 6 2020

Theo mình thì ko có từ your, phải ko?

20 tháng 6 2020
Thanks for listening to me nhé bạn
SECTION A: PASSAGE FOR GAP-FILL In this section you must find a word from the box to complete the numbered blanks in the passage below. Use only ONE word for each blank. (15 points):Used,on, afford, enough, every, soon, wait, usedListening, home, few, who, what, won, allThere was once a large, fat woman (26)... had a small, thin husband.He had a job in a big company and was given his weekly wage(27)...... Friday morning. As (28).. .. as he got (29).......on friday,  his wife(30).....to make...
Đọc tiếp

SECTION A: PASSAGE FOR GAP-FILL In this section you must find a word from the box to complete the numbered blanks in the passage below. Use only ONE word for each blank. (15 points):

Used,on, afford, enough, every, soon, wait, used

Listening, home, few, who, what, won, all

There was once a large, fat woman (26)... had a small, thin husband.He had a job in a big company and was given his weekly wage(27)...... Friday morning. As (28).. .. as he got (29).......on friday,  his wife(30).....to make him give her (31).... his money, and then she(32).... to give him back only (33)......to buy his lunch in the office every day. One day the small man came home very excited. He hurried into the livingroom .His wife was (34).....to the radio and eating chocolates there.You"ll never guess(35)....happened to me today, dear," he said. He waited for a few second and then added. I'll (36)...... ten thousand pounds (37)...... the lottery !".  "That's wonderfull" said his wife delightedly. But then she thought for a(38).....seconds and added angrily, " but (39). ...a moment! How could you (40)....to buy the ticket?"

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14 tháng 6 2020

Ai giúp vs

15 tháng 6 2020

<=> 3x-6x-30=3x-5

<=>3x-6x-3x=5+30

<=>-6x=35

<=>x=-35/6

15 tháng 6 2020

có sai đề ko cậu, mk đọc mà thấy cứ sai sai

18 tháng 6 2020

Lãnh Hàn Thiên Monz

mk ko bt