Question

Use the function x2 + 2x – 15 = 0

How many zeroes does the function have?


Select one:


a. 0

b. 1

c. 2

d. 3

Answer 1

c

Answer 2

are you sure

Answer 3

yes

Answer 4

beware of answers with no explanation
they could be right, they could be wrong

Answer 5

2

Answer 6

chill

Answer 7

C.

Answer 8

there are at least 3 ways for you to do this problem yourself
1) solve the equation
2) compute the discriminant \(b^2-4ac\)
3) graph it using wolfram and check

Answer 9

relying on people shouting out answers here is the worst way to do it
and not vary reliable
here is a picture
http://www.wolframalpha.com/input/?i=x^2+%2B+2x+%E2%80%93+15+%3D+0

Answer 10

bro stfu