Giải giúp mik vs
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\(3x\left(x-y\right)+x-y\)
\(=3x\left(x-y\right)+1\left(x-y\right)\)
\(=\left(x-y\right)\left(3x+1\right)\)
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Bài này quá dễ
x/40 - x/50= 1/3
<=>5x/200 - 4x/200=1/3
<=> x/200= 1/3
<=> x= 200/3.
bạn ê, mik bị ngu toán, lười suy nghĩ ấy mà nên đừng nói dễ hay khó j vs mik
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\(\left|2x-3\right|=3-2x\)
\(ĐK:x\le\dfrac{3}{2}\)
\(\Leftrightarrow\left[{}\begin{matrix}2x-3=3-2x\\3-2x=3-2x\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\0=0\left(đúng\right)\end{matrix}\right.\)
Vậy \(S=\left\{x\in R;x=\dfrac{3}{2}\right\}\)
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2 do
3 usually buy
4 press
5 enjoy
6 has
7 goes
8 gets
9 eat
10 doesn't study
11 doesn't eat
12 doesn't water
13 don't go
14 doesn't eat - is
15 Do - go
16 Do - agree
17 Do you have
18 Do you often eat
19 Does - start
20 does he come
21 does - work
22 does
23 does - do
24 does- go
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Xét tam giác ABH vuông tại H có:
\(sinB=\dfrac{AH}{AB}=0,5\Rightarrow AB=\dfrac{AH}{0,5}=\dfrac{5}{0,5}=10\)
Xét tam giác ABH vuông tại H có:
\(AB^2=AH^2+BH^2\left(Pytago\right)\)
\(\Rightarrow BH=\sqrt{AB^2-AH^2}=\sqrt{10^2-5^2}=5\sqrt{3}\)