Question

Need help solving simple equations

3x-2
x^2-4x+1

Answer 1

Well you have to set each one equal to 0

Answer 2

And solve for x

Answer 3

ok

Answer 4

So for the first one, it is 3x-2=0. Then you add 2 to the other side. Then you divide by 3. That gives you x=2/3

Answer 5

For the second one, you have to factor it

Answer 6

wait

Answer 7

I don't see any equations above.

Answer 8

We can't solve an equation without an equation.

Answer 9

In fact, the things you have written look like two separate expressions.

Answer 10

For the second one, I think you need the quadratic formula

Answer 11

@tookie298 What are the instructions?

Answer 12

if f(x)=3x-2 and g(x)=x^2-4x+1,find (f+g)(x)

Answer 13

Ok then you add f and g
(3x-2)+(x^2-4x+1)

Answer 14

then combine like terms

Answer 15

thats it?

Answer 16

that is it

Answer 17

someone told me I needed to solve them individually than combine together

Answer 18

if you are given f and g, and the only thing you are asked to do is find f+g
then yeah that is it
that is it being all you have to do is
f+g
(3x-2)+(x^2-4x+1)

Answer 19

But if I wanted to solve it individually I would set 3x-2 to 3x-2=0?

Answer 20

I got the answer to the question but I'm not sure how that answer is correct

Answer 21

I don't know what you when you say solve 3x-2
The sentence
"Solve 3x-2." doesn't make any sense because there is nothing to solve.
3x-2 is not an equation. You can not solve it.

Answer 22

If you were given 3x-2=0 <--this is an equation which can be solved

Answer 23

this is a expression than

Answer 24

the answer is x^2-x-1 but how did they come up with x^2?

Answer 25

again you are suppose to add f and g

Answer 26

(3x-2)+(x^2-4x+1)

Answer 27

i see an x^2

Answer 28

re order the expression
3x-2+x^2-4x+1
x^2+3x-4x+1
can you finish the problem now?

Answer 29

Yeah i get that

Answer 30

you cannot have an equation without an equal sign

equation means the 2 expressions are equivalent

Answer 31

Oops forgot to bring down the -2

Answer 32

x^2+3x-4x+1-2

Answer 33

Thanks @triciaal

Answer 34

I understand that freckles

Answer 35

so you see how they get the answer then?

Answer 36

I see how they got but I don't understand how to come to that answer myself

Answer 37

got it*

Answer 38

I mean i understand x^2 but I don't see how it went from "+" to "-"

Answer 39

Ok so do you know what + means?
+ means to add
You are asked to find f+g
f=3x-2
g=x^2-4x+1
replace f with 3x-2 and replace g with x^2-4x+1
f+g
(3x-2)+(x^2-4x+1)
Remember + just we need to add the expreesions

Answer 40

Reorder the terms so that like terms are together
x^2+3x-4x-2+1

Answer 41

I apologize for my lack of knowledge pertaining to this its been awhile

Answer 42

what is 3-4?

Answer 43

I know its -x is that how the expression went from x^2"+"3x-4x-2+1
too x^2(-)x+1? Thats where I've been confused at

Answer 44

it doesn't
it goes from x^2+3x-4x-2+1 to x^2-x-1

Answer 45

yeah thats what I ment the "+">"-" part

Answer 46

the addition to subtract part

Answer 47

well 3x-4x=-1x
and
-2+1=-1

Answer 48

Ah...I thought so

Answer 49

Thanks @freckles

Answer 50

you are just grouping like terms and simplifying
all the terms with x^2 plus all the terms in x plus all the constants

Answer 51

lol I'm still confused were you were confused at