Question

D = 5 căn 18 + căn 50 - 2 căn 18

Answer 1

`D=5\sqrt{18}+\sqrt{50}-2\sqrt{18}`

`D=15\sqrt{2}+5\sqrt{2}-6\sqrt{2}`

`D=14\sqrt{2}`

Answer 2

\(D=5\sqrt{18}+\sqrt{50}-2\sqrt{18}\)

\(D=5\sqrt{9}.\sqrt{2}+\sqrt{25}.\sqrt{2}-2\sqrt{9}.\sqrt{2}\)

\(D=5.3.\sqrt{2}+5\sqrt{2}-2.3.\sqrt{2}\)

\(D=15\sqrt{2}+5\sqrt{2}-6\sqrt{2}\)

\(D=14\sqrt{2}\)