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January 29, 2015

January 29, 2015

Posted by **Mary** on Sunday, April 24, 2011 at 1:04pm.

- Math -
**drwls**, Sunday, April 24, 2011 at 1:24pmSubstitute u = x^2, and solve

25u^2 -15u +2 = 0

(5u -1)(5u-2) = 0

u = 1/5 or 2/5

x = sqrt u

Take it from there.

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