SOLUTION: Given that f(x)=2x-3 (A)Find x such that f(x)=0 (already solved) Ans:3/2 (b)Find x such that f(f(x))=0

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Question 695865: Given that f(x)=2x-3
(A)Find x such that f(x)=0 (already solved) Ans:3/2
(b)Find x such that f(f(x))=0
Answer by mathbird(71) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=2x-3
f(x)=0
2x-3=0
2x=3
x=3/2
f(f(x))=0
f(2x-3)=2(2x-3)-3
=4x-6-3
=4x-9
f(f(x))=0
4x-9=0
4x=9
x=9/4