smarty
Describe the nature of the roots of the equation 2x^2 + 3x = –3.



This Question is Closed

Nancy_Lam
Best Response
You've already chosen the best response.
1
\[\frac{b \pm \sqrt{b^24ac}}{2a}\]
a=2
b=3
c=3
subtitution and solve

sritama
Best Response
You've already chosen the best response.
1
imaginary numbers

smarty
Best Response
You've already chosen the best response.
0
one real root
two real roots
two imaginary roots
cannot be determined

smarty
Best Response
You've already chosen the best response.
0
So C? two imaginary roots?

smarty
Best Response
You've already chosen the best response.
0
@Nancy_Lam

sritama
Best Response
You've already chosen the best response.
1
yeah

smarty
Best Response
You've already chosen the best response.
0
Thanks~

smarty
Best Response
You've already chosen the best response.
0
what about: 7x^2 = 4x + 1.

smarty
Best Response
You've already chosen the best response.
0
@sritama

Nancy_Lam
Best Response
You've already chosen the best response.
1
two imaginary roots

smarty
Best Response
You've already chosen the best response.
0
How can you tell?

smarty
Best Response
You've already chosen the best response.
0
For ex: x^2 – 4x + 4 = 0. how would you tell for that one?

sritama
Best Response
You've already chosen the best response.
1
for the 2nd equation it is b

sritama
Best Response
You've already chosen the best response.
1
7x^2 = 4x + 1 , i mean

smarty
Best Response
You've already chosen the best response.
0
haha alright what about : x^2 – 4x + 4 = 0

sritama
Best Response
You've already chosen the best response.
1
two real roots,and they are same

Nancy_Lam
Best Response
You've already chosen the best response.
1
x^2 – 4x + 4 = 0
(x2)^2

sritama
Best Response
You've already chosen the best response.
1
all you have to get from the value of \[\sqrt{b^24ac}\]

smarty
Best Response
You've already chosen the best response.
0
Ohok. thanks!

smarty
Best Response
You've already chosen the best response.
0
So the root of hte discriminant.

sritama
Best Response
You've already chosen the best response.
1
if the value is negatives, roots are imaginary
if positive . roots are real
if 0,roots are real and same

sritama
Best Response
You've already chosen the best response.
1
yeah