Hơi mờ nhưng mong mọi người thông cảm
K
Khách
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Những câu hỏi liên quan
N
1
AF
1
15 tháng 8 2021
b)\(\sqrt{x^2-10x+25}=2x-3\) ĐK:x≥3/2
\(\Leftrightarrow\sqrt{\left(x-5\right)^2}=2x-3\)
\(\Leftrightarrow\left|x-5\right|=2x-3\)
\(\Leftrightarrow\left[{}\begin{matrix}x-5=2x-3\\x-5=3-2x\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-2\\x=\dfrac{8}{3}\end{matrix}\right.\)
Vậy phương trình có 2 nghiệm là ...
KS
2
19 tháng 11 2023
10a:
\(A=\dfrac{155-\dfrac{10}{7}-\dfrac{5}{11}+\dfrac{5}{23}}{402-\dfrac{26}{7}-\dfrac{13}{11}+\dfrac{13}{23}}+\dfrac{\dfrac{3}{5}+\dfrac{3}{13}-0,9}{\dfrac{7}{91}+0,2-\dfrac{3}{10}}\)
\(=\dfrac{5\left(31-\dfrac{2}{7}-\dfrac{1}{11}+\dfrac{1}{23}\right)}{13\left(31-\dfrac{2}{7}-\dfrac{1}{11}+\dfrac{1}{23}\right)}+\dfrac{\dfrac{3}{5}+\dfrac{3}{13}-\dfrac{3}{10}}{\dfrac{1}{13}+\dfrac{1}{5}-\dfrac{1}{10}}\)
\(=\dfrac{5}{13}+\dfrac{3\left(\dfrac{1}{5}+\dfrac{1}{13}-\dfrac{1}{10}\right)}{\dfrac{1}{5}+\dfrac{1}{13}-\dfrac{1}{10}}\)
\(=\dfrac{5}{13}+3=\dfrac{44}{13}\)
NT
1
DT
10 tháng 12 2021
1. Songkran is the biggest, longest and the most fun festival in Thailand.
2. It is a three-day water fight throughout the whole country.
3. Wild scene of exuberance can be seen throughout the Kingdom of music, where dancing and drinking people are drenched from head to toe.
4. Water guns like hose pipe or bucket can be used to splash people.
5. One thing is for certain: you will get wet!
ND
0
TH
0
17: =7x(x-y)+(x-y)=(x-y)(7x+1)
18: =(x-1)(x+x-1)=(x-1)(2x-1)
16: =4x(x-y)+3(x-y)2
=(x-y)(4x+3x-3y)
=(x-y)(7x-3y)