If #f(x)=2x^2 + x# and #g(x)=x-2# what is [f•g](x)?

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Answer 1 · 2017-10-11T18:24:16

#(f*g)(x)=2x^3-3x^2-2x#

#f(x)=2x^2+x#

#g(x)=x-2#

We know #(f*g)(x)=f(x)*g(x)#

So, #(f*g)(x)=(2x^2+x)(x-2)#

#(f*g)(x)=2x^3-3x^2-2x#

Answer 2 · 2017-10-11T18:44:42

#2x^3-3x^2-2x#

# (f*g)(x)=f(x)xxg(x)#

#=x(2x+1)(x-2)larr" expand factors using FOIL"#

#=x(2x^2-3x-2)#

#=2x^3-3x^2-2x#