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If f(x)=x^2-72 What are the zeros?

 Nov 28, 2018
 #1
avatar+18018 
+2

x^2 -72 = 0

x^2 = 72

x = +- sqrt (72)

 Nov 28, 2018
 #2
avatar+701 
+1

\(f(x) = x^2-72\). y = 0 when x^2 = 72. Square rooting both sides, we find that \(x = \pm\sqrt{72}\) or \(\boxed{x = \pm 6\sqrt{2}}\).

Hope this helps,

- PM 

 Nov 28, 2018
 #3
avatar+701 
0

graph:

 

https://www.desmos.com/calculator/knf4bbbesb

 Nov 28, 2018

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