Determine ƒ(–a) where ƒ(x) = x2– 6x and simplify.

Question

 A  ƒ(–a) = –a2 + 6a

 B  ƒ(–a) = a2 – 6a

 C  ƒ(–a) = a2 + 6a

 D   ƒ(–a) = –a2 – 6a

Answer 1

f(x) = x² - 6x

f(-a) = (-a)² - 6(-a)

 

Now simplify and answer.