Question

how do you find the zeros in functions

Answer 1

\[\frac{ 5(x+2 }{ 3(x-1) (x+7}\]

Answer 2

@phi

Answer 3

a fraction is 0 if its "top" is zero (as long as the bottom is not zero at the same time)

Answer 4

i dont get it??

Answer 5

so does the top need to equal to zero, as long as the bottom isnt zero too??

Answer 6

you have
\[ f(x) = \frac{ 5(x+2) }{ 3(x-1) (x+7)} \]

that will be zero if the numerator is 0.

Answer 7

example: 0/2 = 0
0/anything = 0 (except 0/0 which is not defined)

Answer 8

so to answer your question you should find what x value makes (x+2) zero.

Answer 9

oh ok thank you're very helpful

Answer 10

in other words, you could write down
5(x+2) = 0

divide both side by 5
x+2 = 0/5
x+ 2 = 0
add -2 to both sides
x= -2

that would make the top zero, so x=-2 is a "zero of your function"