<PRE><B>Question 234330</B>
9x(squared)-121=0
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9x^2 - 121 = 0
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(3x)^2-(11)^2 = 0
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Factor:
(3x-11)(3x+11) = 0
x = 11/3 or x = -11/3
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Cheers,
Stan H.</PRE>