Question

Find the value of f(−9) and g(−2) if f(x)=−5x−2 and g(x)=3x2−21x.

Answer 1

F(-9) = -42

G(-2) = 54

Explanation:

f(-9) = 5(-9) - 2

-40 - 2 = -42

`g(-2) = 3x^(2) - 21x`

`3(-2)^(2) - 21(-2)`

`3(4) + 42`

`12 + 42 = 54`