Question

3x^2+2x-1=0
is it
imaginary
irrational
equal
rational

Answer 1

use the discriminant formula

D = b^2 - 4ac

to figure out how many and what type of solutions there are

Answer 2

i do not kn ow that formula

Answer 3

3x^2+2x-1 is in the form ax^2+bx+c

Answer 4

in this case

a = 3
b = 2
c = -1

Answer 5

plug all that into D = b^2 - 4ac and tell me what you get

Answer 6

17

Answer 7

D = b^2 - 4ac

D = (2)^2 - 4(3)(-1)

D = 4 + 12

D =16

Answer 8

D=17

Answer 9

since this is

a) positive

and

b) a perfect square

this means that you have 2 different rational solutions

Answer 10

how are you getting 17

Answer 11

disc=2^2-4*3*-1=16=4^2, which is positive and a perfect square
Hence it is real and rational .

Answer 12

roots are equal only when D=0

Answer 13

i got 17 because i put the problem in right. you used two i used three for a.

Answer 14

no I used a = 3, not a = 2

Answer 15

I used b = 2, you must be mixing those up

Answer 16

my bad i wrote the formula wrong hahaha ok i got 16 now.

Answer 17

D>0 and a perfect square
hence roots are real,rational and different.

Answer 18

can you tell me how to work this i have no idea where to start