Question

Need some answers double checked pretty please!

1. 2x^2-5x+2=0
2.g=(x^2+x) f=(3x-2) (gf)(x)=?
3.ln 1/e^3 =?
4.ln 5root e=?

Answers that I got...

1. -1/2, -2
2.9x^2-9x+2
3. -3
4. 1/5

Answer 1

last two are right

Answer 2

Still checking the first two or are they wrong?

Answer 3

first one is wrong i think

Answer 4

factors as \((x-2)(2x-1)=0\) so both roots are positive

Answer 5

second one also seems to be wrong. i am not sure where you got the 9 from

Answer 6

9x or 9x^2?

Answer 7

\((x^2+x)(3x-2)\) is what you need to multiply

Answer 8

although if it's (g o f)(x) then @StefaniTriscuit 's answer makes sense

Answer 9

\((x^2+x)(3x-2)=3x^3-2x^2+3x^2-2x\) via the distributive property
then combine like terms

Answer 10

ooooooooh sorry, is it \(g\circ f(x)\) ?

Answer 11

It is (g o f)(x)

Answer 12

ooops nvm

Answer 13

My fault, wrote it out wrong.

Answer 14

#2 is right for (g o f)(x)

Answer 15

And I figured out where I went wrong with number 1, got the right answer. Thank you very much guys!!

Answer 16

you are right, only mistake was first one, both should be positive not negative