(2a √a -2 )/(a- √a)=7 (2a √a -2 )/(a- √a)>6

GIÚp mik bài 1 và bài 3 với ạ!!!

Tìm x, biết a) x(2x-7)-4x+14=0 b)x(x-1)+2x-2=0 c)x+x^2-x^3-x^4=0 d)2x^3+3x^2+2x+3=0

WRITE: credit - happy - money - receipt - refunds - something - wrong (C - custorment or SA - shop assistant) 1. What's ___ with it ? C/SA 2. There's ___ wrong with the volumn control. C/SA 3. Can I help my ___ back ? C/SA 4. We don't give ___, I'm Afraid. C/SA 5. I'm not ___ about that. C/SA 6. Can I give you a ___ note. C/SA 7.Have you got the ___ with you? C/SA

cần gấp, giải chi tiết đề bài: tính

3- √1-16x ² 1/1- √x ²-3 Tìm điều kiện xd của biểu thức

Thu gọn các BT sau: a) A = $\sqrt[]{9-6\sqrt[]{2}}$ + $\sqrt[]{9+6\sqrt[]{2}}$ b) B = $\frac{1+2\sqrt[]{27\sqrt[]{2}-38}-\sqrt[]{5-3\sqrt[]{2}}}{\sqrt[]{3\sqrt[]{2}-4}}$

Nguyên tử A có 80 hạt, trong số nơtron lớn hơn số proton là 5 hạt. Tìm số p,e,n

cho a,b,c >0 ,chứng minh răng ,1/a+b⩾1/4(1/a+1/b).

I.Fill in the text with the words in the box.You can use one word more than once. Much many more little less It's important for people to eat as _________ as they need to give them energy.If they eat too _______ food or the wrong food they won't have enough money.If they eat too ________,they will need to make _________ exercise;otherwise they will put on weight. Fat is very high in calories,and has been linked with disease._________ experts believe that eating _______ fat would help to reduce heart disease.Sugar isn't good for energy balance.There's no doubt that too _________ sugar makes you fat and it is not good for your teeth either. On the other hand,fibre that is found in cereals,fruits and vegetables is an important part of a healthy balanced diet.One of the simplest ways of eating ________ fibre is to eat _________ bread.It's a good,cheap source of fibre and nutrients without too _______ calories.Potatoes are good,too. So to keep healthy,eat ________ fatty food,sweets,chocolate,cakes,jam and eat _________ bread,potatoes,pasta,fresh fruit and vegetables.