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09-05-2017
Mathematics

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slove this question c^2-81=0

Respuesta :

09-05-2017

To solve a square root, get the ^2 on one side and the 81 on the other side.
add 81 to both sides.

c^2 = 81
to clear the power of 2, take the square root of both sides.
c = + - sqrt81
c = + - 9
c = 9 and c = -9

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