Question

[Hà Lệ Thu]

giải giúp mik 4 bài cuối với ạ

Answer 1

[YangSu]

\(36,\dfrac{6+2\sqrt{6}}{\sqrt{3}+\sqrt{2}}=\dfrac{\left(6+2\sqrt{6}\right)\left(\sqrt{3}-\sqrt{2}\right)}{\left(\sqrt{3}+\sqrt{2}\right)\left(\sqrt{3}-\sqrt{2}\right)}=\dfrac{6\sqrt{3}-6\sqrt{2}+6\sqrt{2}-4\sqrt{3}}{\sqrt{3^2}-\sqrt{2^2}}=\dfrac{2\sqrt{3}}{3-2}=2\sqrt{3}\)

\(35,\dfrac{5\sqrt{6}+6\sqrt{5}}{\sqrt{5}+\sqrt{6}}=\dfrac{\sqrt{6}.\sqrt{5}\left(\sqrt{5}+\sqrt{6}\right)}{\sqrt{5}+\sqrt{6}}=\sqrt{30}\)

\(34,\dfrac{6\sqrt{2}-4}{\sqrt{2}-3}\\ =\dfrac{\left(6\sqrt{2}-4\right)\left(\sqrt{2}+3\right)}{\left(\sqrt{2}-3\right)\left(\sqrt{2}+3\right)}\\ =\dfrac{6.2+3.6\sqrt{2}-4\sqrt{2}-12}{\sqrt{2^2}-3^2}\\ =\dfrac{12+18\sqrt{2}-4\sqrt{2}-12}{2-9}\\ =-2\sqrt{2}\)

\(33,\dfrac{3\sqrt{2}-2\sqrt{3}}{\sqrt{3}-\sqrt{2}}=\dfrac{\sqrt{3}.\sqrt{2}\left(\sqrt{3}-\sqrt{2}\right)}{\sqrt{3}-\sqrt{2}}=\sqrt{6}\)