Tính a) $\sqrt[]{3}$ x ($\sqrt[]{3}$ - 2 ) + $\sqrt[]{12}$ b) $\sqrt[]{12}$ - 2$\sqrt[]{48}$ + $\frac{7}{5}$ $\sqrt[]{75}$

a) $\sqrt{3}$ x ($\sqrt{3}$ - 2) + $\sqrt{12}$

= 3 - $2\sqrt{3}$ + $2\sqrt{3}$

= 3

b) $\sqrt{12}$ - $2\sqrt{48}$ + $\frac{7}{5}\sqrt{75}$

= $2\sqrt{3}$ - 2 x $4\sqrt{3}$ + $\frac{7}{5}$ x $5\sqrt{3}$

= $2\sqrt{3}$ - $8\sqrt{3}$ + $7\sqrt{3}$

= $\sqrt{3}$