mn giải câu 2 cho mik nha
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Em tách ra và chỉ đăng những bài mình thật sự chưa biết làm em nha!
32. Tom is strong so he can lift that heavy table
33. Nam's father used to drink a lot of wine
34. We have been in Sapa for 2 years
35. l don't mind to help you repair the radio
36.He climbed a tree in order to get a better view
37. Did Jame Watt invent the steam engine?
38. This is the first time she has seen a more unusal festival than this
39. An important experiment is being carry out by the scientists
40. Cheese is made from milk
CHÚC EM HỌC TỐT NHÁ
Bài đọc
1B
2B
3A
4B
5C
Rewrite
1 We have never visited this city
2 Her father told her that she could go to the movie with her friend
3 She has to study harder because she failed the quiz in Math
4 If I had time, I could go some where
5 This car has been bought for 2 years by my father
7(x - 3) - x(3 - x)
= (x - 3)(7 + x)
chỉ bt có v mà k bt có đúng k
1 ) 7 ( x - 3 ) - x ( 3 - x )
= 7 ( x - 3 ) + x ( x - 3 )
= ( x - 3 ) ( 7 + x )
2 ) 4x2 - 6x + 3 - 2x
= 4x2 - 2x - 6x + 3
= 2x ( 2x - 1 ) - 3 ( 2x - 1 )
= ( 2x - 1 ) ( 2x - 3 )
3 ) ( 4 - x ) - 4x + x2
= ( 4 - x ) - x ( 4 - x )
= ( 4 - x ) ( 1 - x )
4 ) x2 - 2xy + y2
= ( x - y )2
Câu 2 : x :248 =1000 - 862
X : 248 = 138
X = 138 x 248
X = 34224
\(\dfrac{x}{10}\) : \(\dfrac{3}{4}\) = \(\dfrac{4}{6}\)
\(\dfrac{x}{10}\) = \(\dfrac{4}{6}\) x \(\dfrac{3}{4}\)
\(\dfrac{x}{10}\) = \(\dfrac{1}{2}\)
x = \(\dfrac{1}{2}\) x 10
x = 5
Câu b):
( 26 x 16 ) - ( 6020 : 35 )
= 416 - 172
= 244
Câu 2:
a). Tìm x:
1. x : 248 = 1000 - 862
x : 248 = 138
x = 138 x 248
x = 34 224
2. \(\dfrac{x}{10}:\dfrac{3}{4}=\dfrac{4}{6}\)
\(\dfrac{x}{10}=\dfrac{4}{6}\) x \(\dfrac{3}{4}\)
\(\dfrac{x}{10}=\dfrac{1}{2}\)
\(x=\dfrac{1}{2}\) x \(10\)
\(x=5\)