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OpenStudy (anonymous):
w^4-20w^2-2=0
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OpenStudy (lilg132):
-19^2 - 2 = 0 19w^2 = 2 19w = 1.414213562373095 w = 0.0744322927564787 not sure if its right
jhonyy9 (jhonyy9):
note w2=x and will get x2 -20x -2=0 x1,2=(20+/- sqrt(400+8))/2 =(20+/- sqrt(408))/2 =(20+/- 2sqrt(102)/2 = =10+/-sqrt102 - so than w1,2=+/- sqrt(10- sqrt102) and w3,4=+/- sqrt(10+sqrt102)
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