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monkey*
 one year ago
Given f(x)=x^2+2x, find f(3).
monkey*
 one year ago
Given f(x)=x^2+2x, find f(3).

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Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1f(3) means x=3 so substitute all x's for 3

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1So, f(3)=3^2+2(4) ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right remember coefficient is also negative so \[\huge\rm (3)^2+2(3)\] now solve

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1(3)^2 is same as 3 times 3

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right so(9)+2(3) = ?

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Would that be my final answer?

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Okay, would you mind helping me with just one more?

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1If f(x)=x3 and g(x)=2x4, find (f+g)(x).

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1I tried working this one out and got 3x7. Which I don't think is right.

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1just one question how did you get 3x :=)

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1I have no idea honestly. Haha

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1so how did you get 3x7 ?

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1At the end how it has f+g and then x. I think that's how I got the x. Can you help?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1(f+g)(x) means add both function f(x) and g(x) so f(x) + g(x)

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1so replace f(X) with x3 and f(x) with 2x4 and then combine like terms (x3)+(2x4)

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Wouldn't you add the x to 2x and it becomes 3x?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right that's what i was asking

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Thank you, so now the 3 and 4¿

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right 34 are like terms

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Ohh, would my answer actually be 3x7?

monkey*
 one year ago
Best ResponseYou've already chosen the best response.1Thank you so much for the help!
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