Pre-Calc Headache

Suppose f(x)=−2×2+3x+8. Compute the following: f(−5)−f(1)=? I’ve done several problems like this and this is the only one that seems to be giving me trouble.

Pre-Calc Headache

Suppose f(x)=−2×2+3x+8. Compute the following: f(−5)−f(1)=? I’ve done several problems like this and this is the only one that seems to be giving me trouble.