Question

f(x)=5/x and g(x)=2x*2+5x what 2 numbers are not in the domain of the f o g

Answer 1

fog would give us 5/g(x)

when is g(x) = 0?

Answer 2

i dont no im confused

Answer 3

factoring g(x) is useful since we know that zero times anything is equal to zero

2x^2+5x ; factor out the common x to get

x(2x+5)

now, for what 2 values of x does: x(2x+5) = 0

Answer 4

o ok thanks man

Answer 5

can you tell me the values of x that would make x(2x+5) = 0 ??

keep in mind that a*b=0 when a=0 or b=0