–5x+7,
X<-1
1+4x,
-1<x<2
3. If f(x)=
then find f(1), f(6), f(f(-2)), f(f(f(3))).
6.
2<x<5
11-x,
x>5
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Answer:
x2 − 22x − 23 = 0
Multiplying the equation throughout by 3,
3x2 − 2×3×2×x − 6 = 0
(3x)2 − 2×3x×2 + (2)2 − (2)2 − 6 = 0
(3x−2)2 − 2 − 6 = 0
(3x−
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