SOLUTION: r(x)=3x and s(x)=x^3-6 find r(s(x))

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Question 874609: r(x)=3x and s(x)=x^3-6
find r(s(x))
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
r(x)=3x


r(s(x))=3*( s(x) ) ... replace EVERY x with s(x)


r(s(x))=3*( x^3 - 6 ) ... replace s(x) on the right side with x^3 - 6


r(s(x))=3x^3 - 18 ... distribute (not always necessary and you can stop on the line above)