functions and graphs 4

Mathematics
Tutor: None Selected Time limit: 1 Day

i am stuck on the following problem. here is a pic of the problem

http://imgur.com/BguJDLY

Nov 18th, 2014

f(x) = x^2 - 9x - 7 

g(x) = 11 - 4x

gof(x) = 11 - 4(x^2 - 9x - 7)

          = 11 - 4x^2 - 36x - 28

Now 

gof(0) = 11 - 4(0)^2 - 36(0) - 28 

          = 11 - 0 - 0 - 28

          = 11 - 28

          = - 17

Hence    gof(0) = - 17

Nov 18th, 2014

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Nov 18th, 2014
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