teagan4christ teagan4christ

08-02-2017
Mathematics

contestada

solve for x.
5x to the second power -80=0

A. {16}
B. {4}
C. {4 , -4}
D. {16 , -16}

Respuesta :

texaschic101 texaschic101

08-02-2017

5x^2 - 80 = 0
5x^2 = 80
x^2 = 80/5
x^2 = 16
x = sqrt 16
x = (4,-4) <===

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