số đó là : 106 x 19 + 3 = 2017

            Đ/S : 2017 

Đúng 100% luôn ko tin thử lại 

nhớ tk mk nhé

a)720:[41-(7x^2-5)=2^3.5

720:[41-(7x^2-5)=40

41-(7x^2-5)=720:40

41-(7x^2-5)=18

7x^2-5=41-18

7x^2-5=23

7x^2=23+5

7x^2=28

x^2=28:7

x^2=4

=>x=4:2

=>x=2

đáp số:100

số kg gạo là:

240 x 50 =12000(kg)

bán hết số gạo đó trong số ngày là

12000:375=32(ngày)

đáp số :32 ngày

\(x^2-5x-3\sqrt{3x}+12=0\)

\(\Leftrightarrow\left(x^2-6x+9\right)+\left(x-2\sqrt{3x}+3\right)=0\)

\(\Leftrightarrow\left(x-3\right)^2+\left(\sqrt{x}-\sqrt{3}\right)^2=0\)

\(\Leftrightarrow\hept{\begin{cases}x-3=0\\\sqrt{x}-\sqrt{3}=0\end{cases}}\Leftrightarrow x=3\)

Vậy...

người đức

A boy/trap/two hours/debris/earthquake/yesterday

=> A boy was trapped in two hours with debris of the earthquake yesterday

When /rescuers/arrive/whole family/already/evacuate

=> When the rescuers arrived, the whole family had already evacuated

three/victims/take/shelter/medical/treatment/this morning

=> Three victims were taken to the shelter for medical treatment this morning

The typhoon/gone/but/ts/damage/remain/long/this area

=> The typhoon has gone but its damage remains long in this area

Because/residents/informed/earlier/this earthquake/the/damage/not signficant

=> Because the residents had informed earlier about this earthquake the damage was not significant

=1+1

=2

kết mình đi

596,55