a,
ĐKXĐ : x\geq 2
Pt => \sqrt{x+3}-3+\sqrt{x-2}-2=0
=> \frac{x+3-9}{\sqrt{x+3}+3}+\frac{x-2-4}{\sqrt{x-2}+2}=0
=> (x-6)(\frac{1}{\sqrt{x+3}+3}+\frac{1}{\sqrt{x-2}+2})=0
=> x=6 (vì cái trong ngoặc > 0)
b,
ĐKXĐ x\geq \frac{1}{2}
Pt => \frac{2x-1-x-2}{\sqrt{2x-1}+\sqrt{x+2}}=x-3
=>...