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18-05-2017
Mathematics

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what is the square root of 2x minus 9 equals the square root of x

Respuesta :

21-05-2017

sqrt(2x-9) =sqrt(x)
squre both sides to clear the sqrt
2x - 9 = x
subtract x from both sides
x - 9 = 0
add 9 to both sides
x = 9
CHECK
sqrt(2* 9 - 9) = sqrt 9
sqrt 9 = sqrt 9
3 = 3

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