+0  
 
0
70
5
avatar+96 

If f(x) = 4x^3 - 4x^2 + 10, then f(-2) =

Olpers  Aug 25, 2018
 #1
avatar+348 
+3

Since in this case \(x = -2\), then we can subsitute \(-2\) in for all the \(x\)‚Äč's. We can get \(4{(-2)}^{3} - 4{(-2)}^{2} + 10\), which equals \(-32 - 16 + 10\), which equals \(-38\).

 

- Daisy

dierdurst  Aug 25, 2018
 #2
avatar+6 
+2

I got f(-2)= -38 but I might have gotten it wrong so ask another person for the answer. Its always best to have more than one perspective anyway

TheLegalBeagle  Aug 25, 2018
 #3
avatar+348 
+3

I got that also, hopefully we are both correct rather than both incorrect... Haha.

 

- Daisy

dierdurst  Aug 25, 2018
edited by dierdurst  Aug 25, 2018
 #4
avatar+6 
+3

Yeah. I also probably should have explained my answer like you did. It's like the saying "give a man a fish and he will feed himself for a day, teach a man to fish and he will feed himself for a lifetime". Same thing here

TheLegalBeagle  Aug 25, 2018
 #5
avatar+96 
+2

Thanks both of you!

Olpers  Aug 25, 2018

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