Giups vs à
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1. Have you met
2. did
3. are you going
4. Do you watch
5. have you lived
6. Did you have
7. did she wear
8. do
9. What have you done
10. Have you gone
\(=\left(\dfrac{\sqrt{x}\left(\sqrt{x}+3\right)}{\left(\sqrt{x}+3\right)\left(\sqrt{x}-3\right)}-\dfrac{4}{\sqrt{x}\left(\sqrt{x}-3\right)}\right).\left(\dfrac{\sqrt{x}+2+\sqrt{x}-2}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\right)\)
\(=\dfrac{x-4}{\sqrt{x}\left(\sqrt{x}+3\right)}.\left(\dfrac{2\sqrt{x}}{x-4}\right)=\dfrac{2}{\sqrt{x}+3}\)
\(B=\dfrac{\sqrt{x-3-2\sqrt{x-3}+1}}{\sqrt{x-3}-1}=\dfrac{\sqrt{\left(\sqrt{x-3}-1\right)^2}}{\sqrt{x-3}-1}=\dfrac{\sqrt{x-3}-1}{\sqrt{x-3}-1}=1\)
1.46 \(a,P=\frac{\sqrt{x}+1}{\sqrt{x}-2}+\frac{2\sqrt{x}}{\sqrt{x}+2}+\frac{2+5\sqrt{x}}{4-x}\)
\(P=\frac{\left(\sqrt{x}+1\right)\left(\sqrt{x}+2\right)}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}+\frac{2\sqrt{x}\left(\sqrt{x}-2\right)}{\left(\sqrt{x}+2\right)\left(\sqrt{x}-2\right)}-\frac{2+5\sqrt{x}}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)
\(P=\frac{x+3\sqrt{x}+2+2x-2\sqrt{x}-2-5\sqrt{x}}{\left(\sqrt{x}-2\right)\left(\sqrt{x}+2\right)}\)
\(P=\frac{3x-4\sqrt{x}}{x-4}\)
gọn quá