f(x)=5-x g(x)=x2-25 a) (f+g)(x) b)(f-g)(x) c)(fg)(x)

Question

operations on functions pre- calculus, domain, graph

Answer 1

"Solution: Given f(x)=5-x g(x)=x²-25
then a) (f+g)(x)=(5-x)+(x²-25)
=x²-x-20
b) (f-g)(x)=(5-x)-(x²-25)
=-x²=x+30
c)(fg)(x)=(5-x)(x²-25)
=-x^3+5x²+25x-125"