Đáp án: Giải Phương Trình √ x(x-1) + √ x(x+2) = 2√ x^(2) - (√x(x-1)+√x(x+2)=2√(x²)) (⇔√(x²)-√x+√(x²)+2√x-2√(x²)=0) (⇔√x=0) (⇔(√x)²=0²) (⇔x=0) (Vậy S=(0))

(√x(x-1)+√x(x+2)=2√(x²)) (⇔√(x²)-√x+√(x²)+2√x-2√(x²)=0) (⇔√x=0) (⇔(√x)²=0²) (⇔x=0) (Vậy S=(0))

hhhhhtttt

5 tháng trước

Giải Phương Trình $\sqrt x(x-1) + \sqrt x(x+2) = 2\sqrt x^{2}$

Xem đáp án

13 lượt xem

2 câu trả lời

Trần Tín

5 tháng trước

$\text{$\sqrt{x}$(x-1)+$\sqrt{x}$(x+2)=2$\sqrt{x²}$}$

$\text{⇔$\sqrt{x²}$-$\sqrt{x}$+$\sqrt{x²}$+2$\sqrt{x}$-2$\sqrt{x²}$=0}$

$\text{⇔$\sqrt{x}$=0}$

$\text{⇔($\sqrt{x}$)²=0²}$

$\text{⇔x=0}$

$\text{Vậy S={0}}$

laihongphuc247

5 tháng trước

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

`<=> sqrt(x^2) - sqrt(x) + sqrt(x^2) + 2sqrt(x)-2sqrt(x^2) = 0`

`<=> sqrtx = 0`

`<=> (sqrt(x))^2 = 0^2`

`<=> x = 0`

Vậy `x=0`

Đăng nhập để trả lời

Câu hỏi trong lớp Xem thêm

Viết một đoạn văn hoàn chỉnh về lý do học tiếng Anh bằng cách đưa ra các manh mối ( ko chép mạng nhá)

3 lượt xem

2 đáp án

15 giờ trước

31- Although I am poor, I always help the poor In spite of______________________ 32- In spite of the bad weather , the pilot will bring the plane down safely Although_ 33- although the team played well, they lost Despite____ 34- In spite of his good salary, he was unhappy in his job In spite of_ 35- in spite of his broken leg, he managed to get out of the car Although_ 26- Athough she is poor, she always helps the poor Much as_ 27- Although he was hard, she didn’t pass the exam Much as_ 28- Although he was rich, he didn’t help the poor No matter how 29- Although Peter is late, he could see the first film No matter_ 30. Although he isn’t rich. He isn’t happy. No matter_ 31. Although It was cold, he didn’t wear warm cloth No matter_ 32. Although his life was hard. He is determined to study well. Hard ______________________________ kết thúc ;-;

3 lượt xem

1 đáp án

15 giờ trước

21- in spite of his age, Mr Benson runs 8 miles before breakfast Although_______________________ 22- Although she said that she would cme, I don’t think she ever will Despite 23- Although we live in the same street, we don’t know each other Although 24- In spite of having little money, they are happy Although 25- In spite of the silly story, I enjoyed the film Although 26- Although Carol had a headache, she still read until late In spite of 27- Despite the bad weather, the trip was enjoyable Although_ 28- Despite being poor, she lives in happiness Even though 29- Despite not having the qualifications, Jane got the job Although_ 30- Although she was ill, she went to work Despite________________________

3 lượt xem

2 đáp án

15 giờ trước

việt nam dành độc lập vào năm nào

3 lượt xem

2 đáp án

15 giờ trước

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

351

351 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

271

271 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

257

257 lượt xem

1 đáp án

1 năm trước

Giải Phương Trình $\sqrt x(x-1) + \sqrt x(x+2) = 2\sqrt x^{2}$

2 câu trả lời

Viết một đoạn văn hoàn chỉnh về lý do học tiếng Anh bằng cách đưa ra các manh mối ( ko chép mạng nhá)

việt nam dành độc lập vào năm nào

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Chúng tôi

Học tốt

Liên kết

Mạng xã hội

Giải Phương Trình $\sqrt x(x-1) + \sqrt x(x+2) = 2\sqrt x^{2}$

2 câu trả lời

Viết một đoạn văn hoàn chỉnh về lý do học tiếng Anh bằng cách đưa ra các manh mối ( ko chép mạng nhá)

việt nam dành độc lập vào năm nào

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.