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If f(x) = x^2 + 4x + 9, find f(-2)
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If f(x) = x^2 + 4x + 9, find f(-2)

User Petervaz
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2 Answers

4 votes
f(-2)= (-2)^2 + 4(-2) + 9= 4 - 8 + 9 = -4 + 9= 5
User Kanstantsin Arlouski
by
8.7k points
4 votes

Hey there!

How do we solve this ?

We substitute the value of -2 instead of x

f ( -2 ) = ( -2 )² + 4 ( -2 ) + 9

f ( -2 ) = 4 - 8 + 9

... f ( -2 ) = 13 - 8

... f ( -2 ) = 5

Hence, the required answer is 5

Hope my answer helps!

User KevDog
by
8.1k points
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