Question

use the discriminant to determine the number of solutions of the quadratic equation, and whether the solutions are real or complex. Note: It is not necessary to find the roots; just determine the number and types of solutions.

1. s^2 - 4s + 4 = 0

2. 5/6x^2 - 7x - 6/5 = 0

3. 7a^2 + 8a + 2 = 0

4. (7)^1/2y^2 - 6y - 13(7)^1/2 = 0

Answer 1

Mini for rescue!

Answer 2

The discriminant is : D= b^2-4ac

if D greater than or equal to 0, the roots are real

If D is less than 0 then the roots are not real

If D=0 the roots are equal

If D is a perfect square, the roots are rational

Answer 3

ii failed this 4 times.

Answer 4

SUch a failure "supaman"

Answer 5

lmao
I'm a superman when it comes to woman. lol NOT math

Answer 6

lols, your C like Saifi :P

You should change your username then to failman, souds better :P

Answer 7

LOL. naw mami. I shall not, but you should help me [:

Answer 8

mami?

I just helped you, you should do it yourself, to stop being a failure

Answer 9

LOL i failed it 4 times, I wouldn't be on here if i could do it myself. Don't I have to like do the work or just point out if its real or not?

Answer 10

I just told you, use he discriminant then decide.

s^2 -4s + 4 = 0
a = 1 , b=-4 , c = 4

then substitute it into the discriminant b^2-4ac

Answer 11

wtf, i never done discriminant.

Answer 12

ill just pay for a tutor. thanks much.

Answer 13

i can teach! ^_^

Answer 14

want to study? free. :p

Answer 15

LOL

Answer 16

if you want too, if you can make since that is.

Answer 17

lols, for free?! then you should help me then :P

Answer 18

Im more worthwhile to help :P

Answer 19

LOL
mimi i can help you with other needs [:

Answer 20

like english? LOL

Answer 21

The discriminant is : D= b^2-4ac

if D greater than or equal to 0, the roots are real

If D is less than 0 then the roots are not real

If D=0 the roots are equal


so for the first one:
s^2 - 4s + 4 = 0

b^2 - 4ac

\[(-4)^2 - 4(1)(4)\]\[16-16\]ZERO.

as the result we are getting is zero, so this tells us that the graph will cute the x-axis once. and both the roots of the x will be same.. or in other words perfect square.

Answer 22

getting it?

Answer 23

Plagiarism DETECTED !

Answer 24

Kind of, The main part I'm stuck on is where you 4ac and so forth.

Answer 25

what grade r u in?

Answer 26

http://www.twiddla.com/657721

Answer 27

come here.

Answer 28

"will cute the axis" lmao

Answer 29

I'm in college math.

Answer 30

College!? :O

Thats year 10 hehe :P

Answer 31

Plagrism confirmed @mini..

@superman, i teach college algebra.

Answer 32

here*

Answer 33

lol mmi i seen that too. but its okay I understood.

Answer 34

Saifi, you NEVER help me, argh :P

Answer 35

Are u in UoP?

Answer 36

Mini what type of help do u want my friend?

Answer 37

dude i dont know the difference, I HATE MATH. unless its pre algebra and algebra in high school just for some reason i suck in this.

Answer 38

are u on that link?

Answer 39

Geometrical Properties of Parabola, it's killing me

Answer 40

Algebra's easy, geometry sucks

Answer 41

Both are easy.

Answer 42

http://www.twiddla.com/657721
go to the link mimi