知道該怎麼跟女朋友道歉了嗎?
Is xy > 0? (1) x - y > -2 (2) x - 2y < -6 : GMAT Data Sufficiency (DS)女朋友生氣時該怎麼辦啊? 恩...這招確實是好招... 女友表示:滿足 溫馨提醒:女友盛怒時千萬不要使用這招,否則你的舌頭可能.....Is xy 0? (1) x - y -2 (2) x - 2y -6 ... Hi all, The process that I went through was reverse the sign of the second equation-x + 2y > 6 (to make the signs same for both equations)...
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