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F(9)=-4(9)^2-4(9)+18=
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F(9)=-4(9)^2-4(9)+18=

User Amirh
by
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1 Answer

3 votes
The answer is -342

Step - by - step

f(9)=-4(9)^2-4(9)+18

= -4*81-36+18

= -324-36+18

= -360+18

= -342
User Itamarb
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