SOLUTION: f(x)=3x^2+2x+5, Evaluate f(3) and f(-5).

Question 348603: f(x)=3x^2+2x+5, Evaluate f(3) and f(-5).
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!
f(x)=3x^2+2x+5, Evaluate f(3) and f(-5).

Just substitute 3 for x and simplify:

f(3)=3(3)^2+2(3)+5

f(3)=3(9)+6+5

f(3)=27+6+5

f(3)=38

------

Just substitute -5 for x and simplify:


f(-5)=3(-5)^2+2(-5)+5

f(-5)=3(25)+(-10)+5

f(-5)=75-10+5

f(-5)=70

That's all there is to it!

Edwin

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