Positive 8 is the answer. Basically all you have to do with that is subtract 4 from 12
Answer: -28
Step-by-step explanation:
f(3) = -5 x (3)^2 - 3 + 20
= -45-3+20
= -28
Hope this helps!
You can simplify a factor 2 in the first fraction:

And you can ignore the ones in the second:

If two fractions have the same denominator, you can sum the numerators:
