Question

If f(x)=x^2-4x-2 find the following values.
F(2)=
F(4)=
F(-3)=

Answer 1

A. f(2)=−6

B. f(4)=−2

C. f(-3)=19

Explanation:

a) f(x)=x^2-4x-2

f(2)=2²−(4)(2)−2

f(2)=2²−(4)(2)−2

f(2)=4+−8+−2

f(2)=(4+−8+−2)(Combine Like Terms)

f(2)=−6

b) f(x)=x^2-4x-2

f(4)=4²−(4)(4)−2

f(4)=4²−(4)(4)−2

f(4)=16+−16+−2

f+4)=(16+−16+−2)(Combine Like Terms)

f(4)=−2

c) f(x)=x^2-4x-2

f(-3)=(−3)²−(4)(−3)−2

f(-3)=(−3)²−(4)(−3)−2

f(-3)=9+12+−2

f(-3)=(9+12+−2)(Combine Like Terms)

f(-3)=19