Rút gọn: $H=\frac{a^2-\sqrt{a}}{a +\sqrt{a}+1}-\frac{a^2 +\sqrt{a}}{a-\sqrt{a}+1}+a+1$

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nguyenbahiep1

[TEX]\frac{a^2 -\sqrt{a}}{a +\sqrt{a}+1} - \frac{a^2 +\sqrt{a}}{a -\sqrt{a}+1} +a +1 \\ \frac{\sqrt{a}(\sqrt{a}^3 -1)}{a+\sqrt{a}+1}+ \frac{\sqrt{a}(\sqrt{a}^3 +1)}{a-\sqrt{a}+1} +a +1 \\ \sqrt{a}(\sqrt{a}-1) + \sqrt{a}(\sqrt{a}+1) +a +1 \\ 2a +a + 1 = 3a +1[/TEX]
 
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