Chủ đề này có 1 trả lời

[z0zLongBongz0z]

Gpt
$\sqrt{x^{2}+x-6}+3\sqrt{x-1}=\sqrt{3x^{2}-6x+19}$

[nthoangcute]

Gpt
$\sqrt{x^{2}+x-6}+3\sqrt{x-1}=\sqrt{3x^{2}-6x+19}$

$\sqrt{x^{2}+x-6}+3\sqrt{x-1}=\sqrt{3x^{2}-6x+19}$
$\Leftrightarrow (\sqrt{x^{2}+x-6}+3\sqrt{x-1})^2=3x^{2}-6x+19$
$\Leftrightarrow x^2+10x-15+6\sqrt{(x^2+x-6)(x-1)}=3x^{2}-6x+19$
$\Leftrightarrow 3\sqrt{(x^2+x-6)(x-1)}=x^2-8x+17$
$\Leftrightarrow 9(x^2+x-6)(x-1)=(x^2-8x+17)^2$
$\Leftrightarrow (x^2-23x+47)(x^2-2x+5)=0$
$\Leftrightarrow ...$