JanicePettay
JanicePettay JanicePettay
  • 09-08-2015
  • Mathematics
contestada

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!

Respuesta :

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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