Đáp án: giải phương trình √(x+3) - √(x-4) = 1 - Đáp án √(x + 3) - √(x - 4) = 1 (1)x>=4(√(x + 3) -√(x - 4))√(x + 3) +√(x - 4)) = √(x + 3) +√(x - 4)(x+3)-(x-4) =√(x + 3) +√(x - 4)√(x + 3) +√(x - 4)=7(2)(1)+(2)2√(x + 3)=8x+3 =16x=13 (n)

nangsofia

2 năm trước

giải phương trình: √(x+3) - √(x-4) = 1

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hanh8411

2 năm trước

Đáp án:

√(x + 3) - √(x - 4) = 1 (1)

x>=4

<=>(√(x + 3) -√(x - 4))√(x + 3) +√(x - 4)) = √(x + 3) +√(x - 4)

<=>(x+3)-(x-4) =√(x + 3) +√(x - 4)

<=>√(x + 3) +√(x - 4)=7(2)

(1)+(2)<=>2√(x + 3)=8

<=>x+3 =16

x=13 (n)

foreverlycorisdeath4191999

2 năm trước

Đáp án:

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giải phương trình: √(x+3) - √(x-4) = 1

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

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.

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giải phương trình: √(x+3) - √(x-4) = 1

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

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.