tui caubengungo mien bac

2) x⁴ + 48x² - 49 = 0

⇔ x⁴ - x² + 49x² - 49 = 0

⇔ x²(x² - 1) + 49(x² - 1) = 0

⇔ (x² - 1)(x² + 49) = 0

Vì x² \(\ge0\) nên x² + 49 \(\ge\) 49 suy ra x² - 1 = 0

⇒ x = \(\pm1\)

Vậy x = \(\pm1\)

a. The international food she likes best

⇒ 3.That's a difficult question.We always go on holiday to a different country and every year.I come home and say that the food was the best in the world!our last holiday was to Japan so now I love Japanese food but I love Vietnamese food,too.

c. How good she is at cooking

⇒ 1.I'm lucky.My mum is a great cook and she loves cooking.She likes teaching me and my brother too,so I can cook quiet a lot of dishes.My mum's dishes are better but my dishes are OK.

d. How healthy her eating habits are

⇒ 4.I try to eat good food and I try not to eat unhealthy snacks.If I'm hungry,I eat carrots,not sweets,but at the weekenk,my mum always makes cakes and I always eat a lot.I love them.

e. Her favourite restaurant

⇒ 5.Last week,my parents took me to a very nice restaurant for my birthday.The food was great but the restaurant was very formal.Next year,I want to go to the Beach Restaurant.They are very friendly and the food is good .I think that's my favourite

f. The food she doesn't like

⇒ 2.I eat most thing.I was a vegetartain for a few months last year but I love meat so I stopped.I don't like food with a lot of salt or fat in it.Oh,I know,mushrooms.I hate them.they are awful.

50+49+48+47+46+...........+3+2+1+0

kết quả tự tính đi nhá

Quá dễ.Đáp án:12

Hồ xuân giải sai rui làm mình hụt điểm nè!

xl tôi ko bt lam ghi phep tinh ra đi

                                                              Bài giải:                                                          

                                            Số tiền vốn của chiếc máy hút bụi là: 

                                            135000 :12 x 100= 1125000 ( đồng )                                 

                                        Giá bán chiếc máy hút bụi đó hết số tiền là:                                               

                                                          1125000 + 135000 = 1260000 ( đồng )                                

                                                                                 Đáp số: 1260000 đồng.

Hỏi linh tinh

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