$\sqrt{3x^{2}-5x+1}-\sqrt{x^{2}-2}=\sqrt{3(x^{2}-x-1)}-\sqrt{x^{2}-3x+4}$
phương trình
Started By kneu, 23-10-2017 - 11:52
#1
Posted 23-10-2017 - 11:52
#2
Posted 23-10-2017 - 16:20
$\Leftrightarrow \sqrt{3x^{2}-5x+1} - \sqrt{3x^{2}-3x-3}=\sqrt{x^{2}-2}-\sqrt{x^{2}-3x+4}$
$\Leftrightarrow \frac{-2x+4}{\sqrt{3x^{2}-5x+1}+\sqrt{3x^{2}-3x-3}}=\frac{3x-6}{\sqrt{x^{2}-2}+\sqrt{x^{2}-3x+4}}$$\Leftrightarrow x=2$
(Trường hợp kia bạn tự chứng minh nhé)
- Tea Coffee likes this
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users