Question

Algebra II help please!

Answer 1

Factor out the top and you should be able to cancel!

Answer 2

How do you factor the top? I'm really bad at factoring... :(

Answer 3

\[\frac{ (2x+1)(x+1) }{ 2x+1}\]

Answer 4

so f(x)=x+1?

Answer 5

yer

Answer 6

@shamil98 do you understand why f(-1/2) is undefined? That's the only other part I don't get...

Answer 7

2x + 1 = 0
2x = -1
x= - 1/2
the domain is all real numbers except -1/2
because f(-1/2) makes the denominator 0 and you can't divide by zero ^.^

Answer 8

thank youuuuuu

Answer 9

to find the domain of a rational function you set the denominator to equal zero and solve.

Answer 10

yer

Answer 11

Yeah it's not f(-1/2) because then you would get a function that's undefined.