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I. ` 20x^(2) - x - 12 = 0` II. ` 20y^(2) + 27y + 9 = 0`A. ` x gt y`B. ` x ge y`C. `x lt y`D. `x le y` |
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Answer» Correct Answer - B I ` 20x^(2) - x - 12 = 0` ` rArr 20x^(2) - 16x- 15x - 12 = 0` ` rArr 4x-(5x-4)+3(5x-4) = 0` ` rArr (5x-4)(4x+3) = 0` ` rArr 5x - 4 = 0 or 4x + 3 = 0` ` rArr x = 4/5 or (-3)/4` II. ` 20y^(2)+27y+ 9 = 0` ` rArr 20y^(2)+15y+12y+9 = 0` ` rArr 5y(4y+3)+3(4y+3) = 0` ` rArr (5y+ 3) (4y+3) = 0` ` rArr y = (-3)/5 or (-3)/4` Clearly, ` x ge y` |
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