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Đưa các pt sau về dạng ax^2 +bx+c
a) 4x^2 +m^2=5(m+1)x
Với m là một hằng số
b) mx^2+2x+5=2x^2+mx-7

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hoang1o1o1

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Đáp án:

$a) 4x^2- 5(m+1)x+m^2=0\\ b) (m-2)x^2+(2-m)x+12=0.$

Giải thích các bước giải:

$a) 4x^2 +m^2=5(m+1)x\\ \Leftrightarrow 4x^2- 5(m+1)x+m^2=0\\ b) mx^2+2x+5=2x^2+mx-7\\ \Leftrightarrow mx^2+2x+5-2x^2-mx+7=0\\ \Leftrightarrow (mx^2-2x^2)+(2x-mx)+(5+7)=0\\ \Leftrightarrow (m-2)x^2+(2-m)x+12=0.$

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Đưa các pt sau về dạng ax^2 +bx+c
a) 4x^2 +m^2=5(m+1)x
Với m là một hằng số
b) mx^2+2x+5=2x^2+mx-7

1 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

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Đưa các pt sau về dạng ax^2 +bx+ca) 4x^2 +m^2=5(m+1)x Với m là một hằng sốb) mx^2+2x+5=2x^2+mx-7

1 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

Đưa các pt sau về dạng ax^2 +bx+c
a) 4x^2 +m^2=5(m+1)x
Với m là một hằng số
b) mx^2+2x+5=2x^2+mx-7

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.