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TN
0
MN
1
DT
Đỗ Thanh Hải
CTVVIP
5 tháng 8 2021
1 does this red dress cost
2 is this shirt
does this short cost
3 do these shoes cost
4 has brown backpack
5 how to get to the bus stop
6 to stay in bed
7 are cleaned by Nga everyday
8 is played with a bow
9 worked for that company for 10 years
10 15 minutes walking to school
KY
19 tháng 8 2021
beautifully
excitedly
interesting
collected
arrangements
peacefully
excited
different
DT
Đỗ Thanh Hải
CTVVIP
4 tháng 10 2021
4 going to buy a lot of things for the party tomorrow
5 is go out somewhere for a drink
6 Jane going to travel around the world
7 short and fair
8 a good football player
9 a fast runner
10 hard workers
11 swim well
12 worked busily
1 A
2 D
3 C
4 A
5 A
6 tháng 8 2021
a,\(x^2-7x+6=x^2-x-6x+6\)
\(=x\left(x-1\right)-6\left(x-1\right)\)
\(=\left(x-6\right)\left(x-1\right)\)
6 tháng 8 2021
a) x2-7x+6=(x2-x)-(6x-6)=x(x-1)-6(x-1)=(x-6)(x-1)
b) x2-6x+3=(x2-6x+9)-6=(x-3)2-\(\sqrt{6^2}\)=(x-3-\(\sqrt{6}\))(x-3+\(\sqrt{6}\))
c) x2-4x+3=(x2-x)-(3x-3)=x(x-1)-3(x-1)=(x-3)(x-1)
d) 3x2-5x+2=(3x2-3x)-(2x-2)=3x(x-1)-2(x-1)=(3x-2)(x-1)
e) 7x2-x-6=(7x2-7x)+(6x-6)=7x(x-1)+6(x-1)=(7x+6)(x-1)
f) 3x2-5x-8=(3x2+3x)-(8x+8)=3x(x+1)-8(x+1)=(3x-8)(x+1)
g) x2-6x+5=(x2-x)-(5x-5)=x(x-1)-5(x-1)=(x-5)(x-1)
h) x2-2x-3=(x2-2x+1)-4=(x-1)2-22=(x-1-2)(x-1+2)=(x-3)(x+1)
i) x2-x-12=(x2+3x)-(4x+12)=x(x+3)-4(x+3)=(x-4)(x+3)
DT
Đỗ Thanh Hải
CTVVIP
10 tháng 10 2021
1 C
2 A
3 D
4 A
5 B
6 D
7 C
8 C
II
1 A
2 B
III
1 deaf
2 countless
3 inventor
4 delivery
IV
1 He worked with deaf-mutes at Boston University in America
2 I am going to see the movie Dream city at 6.45 this evening
V
1 going to visit my friends next Sunday
2 go to the movie tonight
a: Xét tứ giác AEHF có
\(\widehat{AEH}=\widehat{AFH}=\widehat{FAE}=90^0\)
Do đó: AEHF là hình chữ nhật