a) two unequal real roots ;
b) two equal real roots ;
c) no real roots.
Consider the quadratic equation 12px²-60x+25=0 where p≠0. Find the value of p or the range of values of p if the equation has?
2017-10-31 6:09 pm
回答 (1)
2017-10-31 6:43 pm
Consider the quadratic equation 12px^2－60x+25=0 where p≠0. Find the value of p or the range of values of p if the equation has?編輯
a) two unequal real roots ;
Sol
b^2－4ac>0
(－60)^2－4*12p*25>0
3600－1200p>0
3600>1200p
3>p
b) two equal real roots ;
b^2－4ac=0
3600－1200p=0
p=3
c) no real roots.
b^2－4ac<0
3600－1200p<0
3<p
a) two unequal real roots ;
Sol
b^2－4ac>0
(－60)^2－4*12p*25>0
3600－1200p>0
3600>1200p
3>p
b) two equal real roots ;
b^2－4ac=0
3600－1200p=0
p=3
c) no real roots.
b^2－4ac<0
3600－1200p<0
3<p
收錄日期: 2021-04-26 15:43:30
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20171031100936AA662LW