RÚT GỌN
A/ ✔3-2✔2 - ✔3+2✔2
B/ ✔11-6✔2 + 3 + ✔2
K
Khách
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29 tháng 7 2022
b: \(\Leftrightarrow6\sqrt{x-2}-15\cdot\dfrac{\sqrt{x-2}}{5}=20+4\sqrt{x-2}\)
\(\Leftrightarrow\sqrt{x-2}\cdot6-3\sqrt{x-2}-4\sqrt{x-2}=20\)
\(\Leftrightarrow-\sqrt{x-2}=20\)(vô lý)
TH
1
15 tháng 1 2023
Câu 1:
a: Khi x=4 thì \(P=\sqrt{49\cdot4}-\sqrt{16\cdot4}+\sqrt{25\cdot4}-1=7\cdot2-8\cdot2+5\cdot2-1=7\)
b: \(P=7\sqrt{x}-4\sqrt{x}+5\sqrt{x}-1=8\sqrt{x}-1\)
22 tháng 10 2018
1 Has Janice ever visited Brazil ? No , she hasn't .
Has Janice evertried sushi ? Yes , she has
2 Have Tony and Beth ever seen a crocodile? Yes, they have.
3 Has Ben ever visited Brazil? No , he hasn't .
Has Ben ever ridden a camel? Yes, he has.
NN
22 tháng 10 2018
4 Write questions and answers as in the example :
| visit Brazil | try sushi | climb a mountain | see a crocodile | ride a camel | |
|
Janice |
✔ | ✔ | ✔ | ||
|
Tony and Beth |
✔ | ✔ | ✔ | ||
|
Ben |
✔ | ✔ | ✔ |
1 Has Janice ever visited Brazil ? No , she hasn't . Has Janice evertried sushi ? Yes , she has .................................................. ...................................................................................................................................................................................................................................................................................................................................................................................................................
2 ..................have Tony and Beth visited brazil> - Yes they have.................................................................................................................................................................................... ...................................................................................................................................................................................................................................................................................................................................................................................................................
3 ..........has ben climbed a mountain? - yes he has............................................................................................................................................................................................ ................................................
a/ -2
b/ 6