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if a window has area of 49 how much is each sidethis is roots

Rosy wants a large picture window. It has a area of 49 . How long is each side?

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Didi;
I am assuming that the window is a perfect square.
x=one side
x2=49
+/-x=√49
+/-x=7
x=7 or -7, -7 is not a measurement.
x=7
You asked about "roots".  We can do this more elaborately...
x2-49=0
(x+7)(x-7)=0
Either parenthetical equation must equal zero.
x+7=0
x=-7, not applicable.
x-7=0
x=7