Question

Tính : (√2x-y)^2

           (√2x+√8y)^2

Answer 1

\(\left(\sqrt{2x}-y\right)^2=2x-2\sqrt{2x}.y+y^2\)

\(\left(\sqrt{2x}+\sqrt{8y}\right)^2=2x+8y+2\sqrt{16xy}\)

Answer 2

Answer 3

\(\left(\sqrt{2x}-y\right)^2=2x-2\sqrt{2x}y+y^2\)

\(\left(\sqrt{2x}+\sqrt{8y}\right)^2=2x+8y+8\sqrt{xy}\)