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I. 6x^(2) + 25x + 24 = 0""II. 12y^(2) + 13y + 3 = 0 |
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Answer» ` x gt y` ` D = sqrt(B^(2) - ac) ` ` D = sqrt(625-4 xx 24 xx 6)` ` = sqrt(49) = 7` ` x_(1) = (-b+7)/12 = (-25+7)/12 = (-18)/12 =- 3/2` ` x_(2) = (-b-7)/12 = (-25-7)/12 = (-32)/12 =- 8/3` ` x = (-3)/2, (-8)/3` II.` 12y^(2)+13y+3 = 0` ` y_(1) = (-13+sqrt(169-144))/24` ` = (-13+5)/24 = (-8)/24 = (-1)/3` ` y_(2) = (-13-sqrt(169+144))/24 = (-18)/24 = (-3)/4` ` y = (-1)/3, (-3)/4 rArrx lt y` |
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