JanicePettay JanicePettay

08-08-2015
Mathematics

Answered

let f(x)=x^2+x+2 and g(x)=2x^2+5. find f(g(x)). Show each step of your work. Please help me!

Verified Answer :

lynshaoxia lynshaoxia

09-08-2015

just let every x in f(x) be g(x)
it means:
f(g(x))=(2x^2+5)^2+(2x^2+5)+2
=4x^4+20x^2+25+2x^2+5+2
=4x^4+22x^2+32

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