I need help with these last three questions!!!!!

Question

If f(x) = x^2 + 2x + 1 and g(x) = x + 1, then what is f(x) / g(x), and what is the domain?
 

x + 1 [Domain: All real x except -1]

x - 1 [Domain: All real x except -1]

x + 1 [Domain: All real x except 1]

x + 1 [Domain: All real x except 0]

x - 1 [Domain: All real x except 1]
 

If f(x) = x - 7 and g(x) = 2x + 5, then what is f(x) * g(x)?
 

2x^2 + 9x - 35

3x - 2

2x^2 - 9x - 35

3x^2 - 9x - 35

2x^2 - 2x - 35
 
If f(x) = x + 4 and g(x) = 3x - 5, then what is f(x) - g(x)?
 

4x + 9

-2x - 1

-2x + 9

4x - 1

2x + 9

Answer 1

1)

 

f(x) / g(x)

 

Set g(x) equal to zero and solve for x.

 

x + 1 = 0

 

x = -1

 

 

 

2)

 

f(x) * g(x) =

 

(x - 7)(2x + 5)

 

 

Simplify the expression using FOIL method.

 

 

3)

 

f(x) - g(x) =

 

(x + 4) - (3x + 5)

 

 

Simplify the expression.