SOLUTION: Did I solve these right?
1. f(x)= -3x + 1
g(x)= -4x^2 + x + 2
Find g(f(x) )
-4(-3x+1)^2+(-3x+1)+2
-4(-3x+1)^2-3x+1+2
3-3x-4(-3x+1)^2
3-3x-4+24x-36x^2
=21x-36^2-1
2.f(x
Algebra.Com
Question 1002752: Did I solve these right?
1. f(x)= -3x + 1
g(x)= -4x^2 + x + 2
Find g(f(x) )
-4(-3x+1)^2+(-3x+1)+2
-4(-3x+1)^2-3x+1+2
3-3x-4(-3x+1)^2
3-3x-4+24x-36x^2
=21x-36^2-1
2.f(x)= -2x + 1
g(x)= -3x^2 -x -1
Find (g /f)(x)
-3x^2-x-1/-2x+1
3. f(x)=-x +2
g(x)= -4x2 + x + 5
Find (f o g)(x)
f(-4x^2+x+5)
-(-4x^2+x+5)+2
=4x^2-x-5+5
=4x^2-x
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
For 1, you left the variable out of the high order term. Chalking that up to a simple typo, you have it technically correct. However, I would have expressed my answer as:
keeping with the convention of writing the terms in descending order.
2 is spot on IF you were not required to express the rational function result in the form of \ +\ \frac{r(x)}{d(x)})
3. How you got from
\ +\ 2)
to
I cannot fathom.
Should have been
John
My calculator said it, I believe it, that settles it
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