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[lelehieu2016]

Giải các phương trình sau:

a) $(\sqrt{3}-1)x-x+4-\sqrt{3}=0$                 b)$(\sqrt{3}-1)x=2(\sqrt{3}+1)x-3\sqrt{3}$

c)$\frac{(5-x)\sqrt{5-x}+(x-3)(\sqrt{x-3})}{\sqrt{5-x}+\sqrt{x-3}}=2$     d)$x+\sqrt{x-5}=5$

Edited by lelehieu2016, 22-01-2017 - 10:29.

[viet9a14124869]

a,$\Leftrightarrow 4-\sqrt{3}=(2-\sqrt{3})x\Leftrightarrow x=\frac{4-\sqrt{3}}{2-\sqrt{3}}=5+2\sqrt{3}$

b,$\Leftrightarrow 3\sqrt{3}=(3+\sqrt{3})x\Leftrightarrow x=\frac{3\sqrt{3}}{3+\sqrt{3}}=\frac{3\sqrt{3}-3}{2}$

c, thiếu đề nha bạn 

d,ĐKXĐ:$x\geq 5$$\Leftrightarrow \sqrt{x-5}=5-x\Leftrightarrow x\leq 5$$\Rightarrow x=5$