x²-14x-152=0,求x?
回答 (3)
2017-01-09 7:09 pm
21.17744688
2017-01-08 12:11 am
Sol
x^2－14x－152=0
x^2－14x=152
x^2－14x+49=152+49
(x－7)^2=201
X－7=+/-√207
x=7+/-√207
x^2－14x－152=0
x^2－14x=152
x^2－14x+49=152+49
(x－7)^2=201
X－7=+/-√207
x=7+/-√207
2017-01-08 12:11 am
Sol
x^2－14x－152=0
x^2－14x=152
x^2－14x+49=152+49
(x－7)^2=201
X－7=+/-√207
x=7+/-√207
x^2－14x－152=0
x^2－14x=152
x^2－14x+49=152+49
(x－7)^2=201
X－7=+/-√207
x=7+/-√207
收錄日期: 2021-04-18 15:55:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20170107151539AAl6F3N