\(VT=a(a+2)=a^{2}+2a\)

\(VP=a^{2}+2a+1\)

\(\Rightarrow\)\(VT< VP (đpcm)\)

nhường mà vẫn nhanh vậy đó

\(\Leftrightarrow\)\(\left[\begin{array}{} 2x=0\\ x-\dfrac{1}{7}=0 \end{array} \right.\)

\(\Leftrightarrow\)\(\left[\begin{array}{} x=0\\ x=\dfrac{1}{7} \end{array} \right.\)

A

B

Áp dụng định lý pytago nha

B

1.I used to enjoy my childhood

2. I don't remember very well but maybe I went to the field to catch fish when it rained then I took a bath. I was 4 years old then

3. I think not because when I was young there was no one my age. I used to play alone.

4. When I was a child, I liked to go to the fields to catch fish, go fishing and collect insects such as mantises, cicadas, ...

5. I think it is better for children to grow up in the countryside. Because they will learn a lot of things here. Although the conditions here may not be as good as the city. And the children will know what it is:"Tuổi thơ dữ dội"

\(\Leftrightarrow\)\((a-b)^{2}\)\(\ge\)0(luôn đúng)

sai đề hay sao ấy

\(\Leftrightarrow\)\(x\)\(\ge\)-2