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if g(x) = × - 4 and f(x) =× + 5 Find f(×) .g(x)

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Answer:

f(×) .g(x)

=(x+5)(x-4)

=x²-4x+5x-20

=x²+x-20

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Solution:

Step 1. Find (f • g)(x).

Since (f • g)(x) = f( g(x) ), then

= f(x – 4)

= (x – 4) + 5

= x + 1

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