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!
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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
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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
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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 \(10\)
\(x=5\)