If #f(x) = 6x-4x^2-7x^3# and #g(x) = 9x^2-5x#, what is #(f+g)(x)# and #(f-g)(x)#?
1 Answer
Jun 27, 2018
Explanation:
#(f+g)(x)=f(x)+g(x)#
#=6x-4x^2-7x^3+9x^2-5x#
#=-7x^3+5x^2+x#
#(f-g)(x)=(f(x)-g(x)#
#=6x-4x^2-7x^3-9x^2+5x#
#=-7x^3-13x^2+11x#
