14-07-2017
Mathematics

contestada

Solve:

x^2 = 81

x^2 = -9

x^2 = 20

3x^2 = 125

Respuesta :

garydesir1 garydesir1

14-07-2017

Hello Brainiac

x² = 81
Take square root
x = +/-√81
x = 9 or x = -9

x² = -9
We can not do anything for this one.
Thus, No real solutions

x² = 20
Take square root
x = +/-√20
x = 2√5 or x = -2√5

3x² = 125
x² = 125/3
Take square root
x = +/- √125/3
x = 6.45 or x = -6.45

I hope that helps!

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