Question

 Thực hiện phép tính(√12+√3)(√27-√3)

Answer 1

\(=\left(2\sqrt{3}+\sqrt{3}\right)\left(3\sqrt{3}-\sqrt{3}\right)=3\sqrt{3}\cdot2\sqrt{3}=18\)

Answer 2

\(=\left(\sqrt{12}.\sqrt{27}\right)-\left(\sqrt{12}.\sqrt{3}\right)+\left(\sqrt{3}.\sqrt{27}\right)-\left(\sqrt{3}.\sqrt{3}\right)\)

\(=18-6+9-9\)

\(=12\)