`x^3-3x^2+3x+7`
`<=>x^3-4x^2+7x+x^2-4x+7`
`<=>x.(x^2-4x+7)+1.(x^2-4x+7)`
`<=>(x+1)(x^2-4x+7)`
Đáp án: `(x+1)(x^2-4x+7)`
$\text{Đáp án:}$
$\text{Giải thích các bước giải:}$
$\text{Ta có x³-3x²+3x+7}$
$\text{⇒x³+x²-4x²-4x+7x+7}$
$\text{⇒(x³+x²)-(4x²+4x)+(7x+7)}$
$\text{⇒x²(x+1)-4x(x+1)+7(x-1)}$
$\text{⇒(x+1)(x²-4x+7)}$
Giúp em với ạ! Em cảm ơn. ai trả lời đùng em cho 5 sao ạ
Mik không hiểu 2 dòng cuối, mn giúp mik giải cụ thể câu lượng giác cơ bản lớp 10 này ạ, cảm ơn mn
.,.,..,.,.,.,..,.,.,.,..,.,..,.,
Có mấy bài ko cần đến hình ảnh đâu, làm hộ nhanh nha^^ (có thể ghi câu hỏi rồi trả lời thì càng tốt) 1) Choose the word with the different stress pattern . A appear B parent C accept D become 2) Choose the word which has a different sound in the underlined part from others . A cow B show C now D how 3) Choose the word which has a different sound in the underlined part from others . A cloth B no C close D rose 4) Choose the word which has a different sound in the underlined part from others . A gold B postcard C doctor D open 5) Choose the word or phrase that is OPPOSITE in meaning to the underlined part in the following sentence. CAN YOU PLEASE _TURN UP_ THE VOLUME ? I CAN'T HEAR ANYTHING. A turn off B turn down C turn into D turn on 6) Choose the word or phrase that is OPPOSITE in meaning to the underlined part in the following sentence . THANK GOD, YOU'RE HERE IS A VERY _ENTERTAINING_ COMEDY PROGRAMME BASED ON AN AUTRALIAN TV SHOW. A interesting B boring C sad D unhappy 7) Choose the word with the different stress pattern. A study B begin C finish D party 8) Choose the word with the different stress pattern. A relax B enter C paper D busy 9) Choose the word which has a different sound in the underlined part from others A documentary B industry C studio D cute 10) Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following sentence . PLAYING SPORTS _REGULARLY_ CAN BRING MANY HEALTH BENEFITS. A sometimes B randomly C frequently D rarely 11) Choose the word which has a different sound in the underlined part from others. A fair B breath C pear D prepare 12) Choose the word which has a different sound in the underlined part from others. A low B rose C nose D boring 13) Choose the word or phrase that is OPPOSITE in meaning to the underlined part in the following sentence. LINH OFTEN _WASTES_ MONEY IN BUYING CLOTHES THAT SHE JUST WEARS A FEW TIMES. A pays B spends C saves D makes 14) Choose the word which has a different sound in the underlined part from others. A channel B favourite C programme D animal 15) Choose the word which has a different sound in the underlined part from others A found B bound C bought D cloud 16) Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following sentence. A smart B careful C foxy D skilful 17) Choose the word which has a different sound in the underlined part from others A arm B warm C charm D farm 18) Choose the word with the different stress pattern A personally B correctly C carefully D seriously 19) Choose the word which has a different sound in the underlined part from others. A then B theme C rhythm D brother 20) Choose the word or phrase that is CLOSEST in meaning to the underlined part in the following sentence. THE _CONTENT_ OF THE MOVIE I WATCHED LAST NIGHT IS REALLY THRILLING. A script B topic C plot D theme 21) Choose the word which has a different sound in the underlined part from others . A start B stars C marbles D solar 22) Choose the word which has a different sound in the underlined part from others . A wine B shy C why D kill 23) Choose the word which has a different sound in the underlined part from others A plastic B grandparent C back D ask 24) Choose the word with the different stress pattern . A memorable B excited C interested D confident
Vì sao khi nhìn 1 vật qua tấm kính mỏng thì rõ nhưng nhìn qua tấm kính càng dày thì càng khó nhìn?
Có mấy loại nhân hoá? Em hãy nêu các loại đó?
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Vẽ đậu mầm cầm lon soda, full màu, full line
Điểm $M(x,y)$ của mặt phẳng tọa độ được gọi là điểm nguyên nếu cả x và y đều là các số nguyên. Tìm số nguyên dương n nhỏ nhất sao cho từ mỗi bộ n điểm nguyên đều tìm được bộ ba điểm nguyên là đỉnh của một tam giác có diện tích nguyên (trong trường hợp ba điểm thẳng hàng thì coi diện tích bằng 0).
viết 1 đoạn văn 200 chữ trình bày suy nghĩ về chủ đề hạnh phúc
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