smithcristy smithcristy
  • 14-03-2018
  • Mathematics
contestada

f(x)=x^2-2x-1  and   g(x)=5x-1/7x-3

find f(x+7) and g(x/2)

Respuesta :

yellowyarn2003 yellowyarn2003
  • 14-03-2018
f(x + 7)
(x + 7)² - 2(x + 7) - 1
x² + 14x + 49 - 2x - 14 - 1
x² + 12x + 49 - 15
x² + 12x + 34
f(x + 7) = x² + 12x + 34

g(x/2)
5(x/2)² - 1/7(x/2) - 3
5(x²/4) - x/14 - 3
5x²/4 - x/14 - 3
g(x/2) = 5x²/4 - x/14 - 3
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