Ask
your own question, for FREE!
Mathematics
12 Online
alones (alones):
Check
Join the QuestionCove community and study together with friends!
Sign Up
alones (alones):
\[5x^2 + 7x = 6 \]
alones (alones):
What is the value of b^2 - 4ac for the following equation?
My answer is 81
OpenStudy (kittiwitti1):
I got 169.
alones (alones):
Lat time one user said it's wrong so, i went back and redid it and i got 81
OpenStudy (kittiwitti1):
Hmm... how did you work out 81?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (kittiwitti1):
And did that person explain how it was wrong? xD
OpenStudy (anitas.):
WRONG...
alones (alones):
My first asnwer was 169 kittiwitti but they claim it wrong /:
OpenStudy (kittiwitti1):
You didn't say "find \(b^{2}-4ac\)" in the first link lol
Join the QuestionCove community and study together with friends!
Sign Up
alones (alones):
Lol i didn'T xP
Directrix (directrix):
5x² + 7x - 6 = 0
a = 5
b = 7
and
c = -6
Directrix (directrix):
Discriminant
b² - 4*a*c
Directrix (directrix):
( )² - 4 * ( ) * ( )
( 7 )² - 4 * ( 5 ) * (-6 ) =
Directrix (directrix):
@AloneS
Join the QuestionCove community and study together with friends!
Sign Up
alones (alones):
Uhh sorry i'm lagging like always.
Okay
so ( 7)² - 4 * (5 ) * ( -6)
( 7 )² - 4 * ( 5 ) * (-6 ) =169
Yea i got 169 again
Directrix (directrix):
169
alones (alones):
Wait @robtobey, why did u delete it I was writing it down :3
Thanks, at least i'm finally right
Directrix (directrix):
( 7 )² - 4 * ( 5 ) * (-6 ) =169
alones (alones):
Thank you my ANGEL!!!!FINALLY I GOT IT RIGHT!!!
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!