Giúp em bài IV vs ah
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DT
Đỗ Thanh Hải
CTVVIP
18 tháng 8 2021
1 me not to open the window
2 she shared memories of her trip with me
3 as responsible as Emily
4 surfing the net for the location of Ninh Binh Province
5 going to be redecorated for us next month
6 they would celebrate a birthday party the next evening
7 me when I was going to submit my research paper
8 off your coat and hat when you come ínide
9 for our trip to VN will be books by Alex
10 the news about ancient towns
11 hard enough to pass the final exam
12 being intelligent, she can solve even difficult Maths problem
13 they would discuss about that problem the next week
14 fast food Alex eats, the more weight he gains
15 never visited Pharaoh tombs before
CT
1 tháng 8 2021
1.Cathedral
2.Tombs
3.Citadel
4.Fortress
5.Cavern
6.Limestone
7.Pagoda
8.Scupltures
10 tháng 12 2023
IV
1:
ĐKXĐ: \(x\in R\)
\(3\sqrt{x^2-3x+5}+2\left(x+1\right)\left(x-4\right)=9\)
=>\(3\sqrt{x^2-3x+5}+2\left(x^2-3x-4\right)=9\)
=>\(3\sqrt{x^2-3x+5}+2\left(x^2-3x+5-9\right)=9\)
=>\(2\left(x^2-3x+5\right)+3\sqrt{x^2-3x+5}-27=0\)
=>\(2\left(x^2-3x+5\right)+9\sqrt{x^2-3x+5}-6\sqrt{x^2-3x+5}-27=0\)
=>\(\sqrt{x^2-3x+5}\left(2\sqrt{x^2-3x+5}+9\right)-3\left(2\sqrt{x^2-3x+5}+9\right)=0\)
=>\(\left(2\sqrt{x^2-3x+5}+9\right)\left(\sqrt{x^2-3x+5}-3\right)=0\)
=>\(\sqrt{x^2-3x+5}-3=0\)
=>\(\sqrt{x^2-3x+5}=3\)
=>\(x^2-3x+5=9\)
=>\(x^2-3x-4=0\)
=>(x-4)(x+1)=0
=>\(\left[{}\begin{matrix}x-4=0\\x+1=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=4\\x=-1\end{matrix}\right.\)
MT
2
KV
2 tháng 5 2023
Bài 6
a) (3x² + 5) + [(2x² - 5x) - (5x² + 4)]
= 3x² + 5 + (2x² - 5x - 5x² - 4)
= 3x² + 5 + 2x² - 5x - 5x² - 4
= (3x² + 2x² - 5x²) - 5x + (5 - 4)
= -5x + 1
---------‐----------
b) (x + 2)(x² - 2x + 4)
= x.x² - x.2x + x.4 + 2.x² - 2.2x + 2.4
= x³ - 2x² + 4x + 2x² - 4x + 8
= x³ + (-2x² + 2x²) + (4x - 4x) + 8
= x³ + 8
-------------------
c) (4x³ - 8x² + 13x - 5) : (2x - 1)
= (4x³ - 2x² - 6x² + 3x + 10x - 5) : (2x - 1)
= [(4x³ - 2x²) - (6x² - 3x) + (10x - 5)] : (2x - 1)
= [2x²(2x - 1) - 3x(2x - 1) + 5(2x - 1)] : (2x - 1)
= (2x - 1)(2x² - 3x + 5) : (2x - 1)
= 2x² - 3x + 5
mng giúp mình bài 2 bài 3 bài 4 vs ah
20 tháng 9 2021
Bài 6:
a: Xét ΔAPC có
M là trung điểm của AC
Q là trung điểm của PC
Do đó: MQ là đường trung bình của ΔAPC
Suy ra: MQ//AP
Xét ΔBMQ có
P là trung điểm của BQ
PD//MQ
Do đó: D là trung điểm của BM
Suy ra: DB=DM
DT
Đỗ Thanh Hải
CTVVIP
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 phýical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 physical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
KY
14 tháng 7 2021
I wish the council wasn't demolishing it
If I were good at English, I could become a tour guide
"I will hold an event about skin care next month" Mary said
She was given the book " The fault in our stars " as a birthday gift by him
He wishes he could come to his brother's wedding
He advised me not to longer spend most of time chatting on Facebook.
How long did you start searching for some facts in the past ?
My mother used to for me when I married my wife
She was so frightened that she lost control of her car.
It was such a delicious dessert that I decided to order portion
Because of my sickness, I don't go out
