Question

What is f(–3) for the function f(a) = –2a^2 – 5a + 4?

Answer 1

f(-3) meaning a= -3
so substitute a for -3

Answer 2

9

Answer 3

i didn't get 9..

Answer 4

\[\huge\rm -2\color{ReD}{a^2} -5\color{Red}{a} +4 \]replace all a by -3
and remember square of negative number = positive number