Algebra 2b u2 l6 functions operations practice #1-3

let f(x)=2x^2+x-3 and g(x)=x-1. perform the indicated operation, then find the domain

1 (f-g)*(x)

a x^2-4; domain: positive real numbers
b 2x^2-4; domain: all real numbers
c x^2-4; domain: all real numbers
d 2x^2-2; domain: all real numbers

2 (f*g)(x)

a 2x^3-x^2-4x+3; domain: all real numbers
b 2x^3+x^2-3x; domain: all real numbers
c 2x^3+x^2+4x-3; domain: negative real numbers
d 2x^2+x-3x+3; domain: positive real numbers

3 f/g(x)

a 1/2x+3; domain: all real numbers except x=-3/2
b 2x+3; domain: all real numbers
c 2x^2+3; domain: all real numbers
d 2x+3; domain: all real numbers except x=1