Question

How can you tell when a quadratic equation has two identical, rational solutions?
* when the radicand is negative

* when b in the quadratic formula is greater than the radicand

* when the radicand equals zero

* when the radicand is not a perfect square

Answer 1

roots are rational when determinant is >=0. Equal roots when determinant equal to 0.

Answer 2

saifoo. is he right? ^^

Answer 3

wait, so what number is that? the first, second, third or fourth one?

Answer 4

Yes he is.

Answer 5

* when b in the quadratic formula is greater than the radicand

Answer 6

coz the discriminant lies in radicant itself.

Answer 7

the first one

"How can you tell when a quadratic equation has two identical, rational solutions?"

Answer 8

than you so much :) saifoo, thanks. your REALLY smart.

Answer 9

You welcome ello! ^_^

Answer 10

And thanks.

Answer 11

no problem :)

Answer 12

you too ricky :P i didnt forget about you :)

Answer 13

:), just google I found out great web, IDK if they have Chemistry

Answer 14

and one more question, then im done. For which value of x does the graph of y = 3x2 − 2x − 5 cross the x-axis

Answer 15

lol, thanks ello! ^_^

Answer 16

-3/5?
-1?
-2?
-5/3?

Answer 17

5/3 & -1

Answer 18

since it quadratic equation & I used my Ti-84 i assume that -5/3

Answer 19

i used my fx-570Es

Answer 20

well it only has -1 and -5/3, theres no both :( which one would it be? -1 ?

Answer 21

yes as one option is right, so -1

Answer 22

ok thanks :)) so much :D and i followed you on g+ :)

Answer 23

Oh cool.
but the thing is im not using g+ now a days! :/

Answer 24

You guys where wrong on the first question. @saifoo.khan @ellomatejuly @RickyTruong