Question

Which choice correctly shows the solution(s) of the equation x2 = 256?

Answer 1

Answer:

x = ± 16

Step-by-step explanation:

x^2 = 256

Take the square root of each side

sqrt(x^2) = ±sqrt(256)

x = ± 16

Answer 2

Answer:

± 16    ,  -16 and +16

Step-by-step explanation:

 x^2 = 256              Take the square root on both sides and solve

 x =  ± 16

It can be both negative and positive because:

-16 x -16 = + 256

16 x 16 = + 256

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