Question

Cho biết căn bậc 2x =8 tìm x^2

Answer 1

\(\sqrt{2x}=8\Rightarrow2x=8^2\)

\(2x=64\)

\(x=64:2=32\)

\(x^2=32^2=1024\)

Answer 2

=>2x=8^2=64

=>x=32=>x^2=3262=1024

Answer 3

Ta có : 2x=8

=> x=8:2

=> x=4

=>x^2=4^2

=>x^2=16

Vậy x=16

Answer 4

\(\sqrt{x}=8\)

\(\Rightarrow x=8^2=64\)

\(\Rightarrow x^2=64.64=4096\)

Answer 5

Ta có:

\(\sqrt{x}=8\Rightarrow x=8^2=64\Rightarrow x^2=64^2=4096\)

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