a,5x^2+3(x+y)^2-5y^2 b,x^2-y^2+3x-3y giúp tui nha mn tối nay hết hạn nộp ròi T-T

vẽ mầm NL : 200 hay nhất thẳng tiến

tổng của 3 số là 1978 . Số thứ nhất lớn hơn tổng của hai số kia là 58 . nếu bớt ở số thứ 2 đi 36 đơn vị thì số thứ 2 bằng số thứ 3.hãy tìm 3 số đó

giúp mình với nha. Mình cảm ơn nhiều

Read the reading below, say whether the statements are true ( T ) or false ( F ). (Write T or F at the end of the statement.) HELPING MORTHER AT HOME Every child should love his mother. A girl or boy learns’ many good things from mother. Mother teachers us to be obedient, helpful and friendly to others. Ever since my young days I have always helped my mother in the kitchen. I get up early in the morning and help my mother prepare breakfast. Then I clean the kitchen and sweep the floor. I also help mother wash the post and pans. On Sunday I follow my mother to the market and help her to carry vegetables and fish back home. Some times my mother asks me to cut vegetables. I readily do I wash vegetables. I like to give small help whenever I am free from school work. One day when my mother was sick, I cooked dishes for lunch. My mother is always happy and tells me that I should be good to everyone. Every mother will be happy if her children help her at home. 1. It’s a useful lesson for children to love their parents. 2. Children can learn a lot of good things from their mother. 3. The writer seldom helps her mother at home. 4. She gets up late and does nothing in the morning. 5. On Sunday she goes shopping alone.

Cho biết tên thật của thanh tịnh

Mn giúp em bài này với ạ!! Em đang cần gấp

1. She likes her job but does not like wear uniforms. A B C D 2. They speak English well because they practise speak it everyday. A B C D 3. Lan was in a difficult situation, so I agreed lending her some money. A B C D 4. Don't forget attending our meeting next month on time. A B C D 5. I spent most of time in the train read my favorite book. A B C D 6. I heard him talked about you this morning. A B C D 7. I enjoy watching the sun to rise slowly in the morning. A B C D 8. Why should you to carry this box? It's too heavy for you. A B C D 9. She said the letter was personal and wouldn't let me to reach it. A B C D 10. I'm glad hearing that you have made much progress in your study. A B C D

cho x/2=y/4=z/7 . Tính giá trị của M = 5x−2y+4z/x+3y−5z

Tìm x $\in$ N biết: $5^{x}$ . $5^{x+1}$ $. 5^{x+2}$ $\leq$ $\underbrace{100.......0}_{18 chữ số 0}$ : $2^{18}$