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I` 12x^(2) - x -1 = 0 " "II. 20y^(2) - 41y+20 = 0`A. ` x gt y`B. ` x ge y`C. ` x lt y`D. Relationship between x and y cannot be determined |
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Answer» Correct Answer - C I. ` 12x^(2) - x - 1 = 0` `x_(1) =(-b+sqrtD)/(2a) =(1+sqrt(1-4 xx12xx-1))/24` ` =(1+7)/24 = 8/24 = 1/3` ` x_(2) = (-b-sqrtD)/(2a) ` ` x_(2) = (1-7)/24 = (-6)/24 = (-1)/4` ` x = 1/3, -1/4` II ` 20y^(2)-41y+20=0` ` y_(1) = (41-sqrt(1681-1600))/40` ` y_(2) = (41-sqrt(1681-1600))/40` ` y_(1) = (41+9)/40 = 50/40,y_(2) = 32/40` ` y = 5/4,4/5 rArr x lt y` |
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