SOLUTION: I honestly have no idea how to answer this problem. It's not from a book, my teacher made it up. f(x)=x+4 find (f(x))^2 I wrote down (x+4)^2 which equals x^2+16 just to have

Question 56925: I honestly have no idea how to answer this problem. It's not from a book, my teacher made it up.
f(x)=x+4
find (f(x))^2
I wrote down (x+4)^2 which equals x^2+16 just to have an answer. I'd rather have an example problem like this one so I could learn from that instead of just having a correct answer. Thank you!
Found 2 solutions by stanbon, funmath:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
f(x)=x+4
find (f(x))^2
[f(x)]^2=(x+4)^2
=(x+4)(x+4)
Use the FOIL method to get the product, as follows:
F: x*x=x^2
O: x*4=4x
I: 4*x=4x
L: 4*4=16
Addthe results to get:
x^2+8x+16
Hope this helps.
Cheers,
Stan H.
Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
I honestly have no idea how to answer this problem. It's not from a book, my teacher made it up.
f(x)=x+4
find (f(x))^2
I'd rather have an example problem like this one so I could learn from that instead of just having a correct answer. Thank you!
:
Ok, here you go.
What if f(x)=x+5
Find
= does not =, observe:
=
=
=
=
=
You are missing your middle term, because you didn't FOIL.
I hope you liked my example, I admire your ethics.
Happy Calculating!!!
funmath
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