If-7[img]2014m5x/ct_egreqj_egreqjs_0024_20132[/img]x[img]2014m5x/ct_egreqj_egreq

游客2025-02-24  7

问题 If-7x5 and -3y4, what is the greatest possible value of (y-x)(x+y)?

选项

答案 99

解析 The correct answer is -9. The goal would be to make x+y or y-x as big as possible. The biggest x+y is 9(5+4). Then y-x is-1(4-5). -1x9=-9.
转载请注明原文地址:https://tihaiku.com/zcyy/3970649.html
最新回复(0)