Question
Asked Oct 15, 2019
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Use the function f(x)=x^2-4 and g(x)=2x+20 answer parts (a)-(g)

(a) Solve f(x)>0.

What is the correct answer in interval notation?

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Expert Answer

Step 1

Given function is

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f(x)x-4

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Step 2

On solving for f ...

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f(x)> 0 x2-40 x-220 (x-2)(x +2)> 0 case(1) (x2)0 and (x2)> 0 x2 and x>-2 xE (2, 00) or case(2) (x 2) 0 and (x+2)<0 x2 and x < -2 xe(2)

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