slimshadee2016 slimshadee2016

11-03-2016
Mathematics

contestada

help me find the solution to this quadratic formula 5r^2=80

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Justokay Justokay

11-03-2016

This is an easier way:
5r^2=80
Both sides divided by 5.
r^2=16
And then both sides the root.
r=4 or r=-4

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