Question

What is the possible discriminant of the graph?
a. –17
b. 0
c. 12
d. 49

Answer 1

i dont know what discriminant means?

Answer 2

thats ok if u dont know, thanks anyway

Answer 3

i could answer the question for u if u tell me

Answer 4

its basically, the answer to part of the quadratic equation which is b^2 - 4ac

Answer 5

i c ok 1 sec

Answer 6

i think its 0, b, b/c it only has one x intercept, am i right?

Answer 7

..

Answer 8

well, if what you said for discriminate is correct then the answer I got is 36
b^2 - 4ac
(-6) ^2 - 4 a(0)
-6^2 = 36
-4a(0) = 0
but 36 is not one of the answers, did i do something wrong?

Answer 9

the equation of the graph is
\[y=(x+5)^2\]
which is equivalent to y = x^2+10 x+25
hence a=1,b=10 and c=25.
the discriminant is
10^2 -(4)(1)(25)=0

Answer 10

Oh i see, I thought that the (B,C) above the point was supposed to be b and c to solve the equation but instead you find the actual equation and solve with that. Thanks, event though this wasn't my question.

Answer 11

its a negative 5

Answer 12

Really? wow okay, i'm stupid, bad resolution on my screen made it look like b and c not -5 and 0 sorry.

Answer 13

its okay, so now what?

Answer 14

umm.. read what Safiah said.

Answer 15

i did but its not a Positive 5

Answer 16

on the graph its a 5

Answer 17

-5

Answer 18

okay, then put in the negative,

(x-5)^2
X^2-10x+25
a =1; b = -10; c = 25
b^2-4ac
(-10)^2 - 4 (1)(25)
100 - 100 = 0

same answer (by the way, when graphing exponential equations, what ever number added to x inside those () will be moved to the left on the x-axis)
what Safiah said was correct but even differently its the same answer

Answer 19

so its 0, b?

Answer 20

yea

Answer 21

thank u, so i was right bye