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Republican31
 one year ago
If g(x) = x2 – 2x, find the value of g(3) + 1.
Is 8 = 4 + 4 correct?
Republican31
 one year ago
If g(x) = x2 – 2x, find the value of g(3) + 1. Is 8 = 4 + 4 correct?

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If you mean \[\Large g(x)=x^22x\] then \[\Large g(3)+1=(3)^{2}2(3)+1=9+6+1=16\]

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Yes sorry that is what I meant. I didn't notice that little formatting error.

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1But it's 3 + 1, meaning 2, right?

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1So does that mean it is 8 or 16?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If you mean \[g(3+1)\] then is 8, but if is \[g(3)+1\] then is 16

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1\[g(\color{red}{3})+1=(\color{red}{3})^{2}2(\color{red}{3})+1=\color{red}{9}+6+1=16\]

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Which part is confusing you exactly?

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1So 16 = 9+6+1 is correct?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Well, when you add 9 + 6 + 1, what do you get?

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1I just don't understand how (3) + 1 is any different from (3 + 1) unless it's because of the g in front. I don't like these functions.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Well, think about \(x=3\) , does that also mean \(x=3+1\)?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Your question is basically saying that you have a function \(g(x) = x^22x\), now when \(x=3\) you replace \(3\) wherever you see \(x\) in the function.

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Okay. And then the +1? I see it come in at 2x, but not for the x^2.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Ontop of that, you're adding a `+1` to your function's value, therefore \(g(x)+1\) is what you're solving for.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the +1 you can add up at the end

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Okay but why isn't it + 2 for both times that x was used?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Okay let's try a different question. Like to try a different one? This time you will solve it.

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1I'm sorry I just am having trouble understanding. What I'm wondering is if there was x2  2x, then doesn't that mean (3) + 1 was used twice, so there should be a + 1 from each time x was used in the equation

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Let's take \(f(x) = x^3+3x+5\) and we're finding \(f(5)+3\)

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1So what is the first step you would do?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1\[f(\color{blue}{5}) = (\color{blue}{5})^3 +3(\color{blue}{5})+5\]

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Did you get 125  15 + 5?

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Ya. I saw my mistake of having 125 instead of 125.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Alright :D and that gives you 135 correct?

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1Now that we've solved that portion, we're going to add \(+3\) to our answer. This is because we are looking for \(f(5)\color{blue}{+3}\) and not just \(f(5)\)

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1So then what is 135 + 3?

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Alright but I just was wondering why it isn't (5) + 3^2. And it's 132.

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.1To my knowledge, we're changing and shifting a function by changing the x value. you `might` be over thinking it!

Republican31
 one year ago
Best ResponseYou've already chosen the best response.1Alright. Thank you so much for all your help!
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