Question

simplify completely 3x^2+21x-54/x^2+3x-54

Answer 1

\[\huge\color{blue}{ \frac{3x^2+21x-54}{x^2+3x-54 } } \]
\[\huge\color{blue}{ \frac{3(x^2+7x-18)}{x^2+3x-54 } } \]
\[\huge\color{blue}{ \frac{3( x+9 ) (x-2)}{(x-6)(x+9) } } \]

Answer 2

Go from here.

Answer 3

was gonna say let her factor it out, she's asked previous questions with the same thing, ...

Answer 4

Oh, I didn't see the previous question, just logged on, sorry.

Answer 5

@helpineedit, can you do it from where I left of?

Answer 6

\[\huge\color{blue}{ \frac{3 \color{red} { (x+9) } (x-2)}{(x-6)\color{red} { (x+9) } } } \]see what cancels?

Answer 7

so 3(x-2)/(x-6)

Answer 8

Yup!

Answer 9

thnks for helping me :)

Answer 10

YW!

Answer 11

could u help me with 3 more?

Answer 12

i can try at least.

Answer 13

Ask

Answer 14

simplify completely 2x^2+13x+20/x^2-5x-36

Answer 15

\[\huge\color{blue}{ \frac{2x^2+13x+20}{x^2-5x-36 } } \]can you do this the same way I did the previous question?

Answer 16

2+13x+20/-5x-36

Answer 17

What? Are you saying that that's the question (instead of what I wrote) ?

Answer 18

oh no i was trying and i guess failing at canceling out

Answer 19

Sorry, hold on.

Answer 20

Factor the numerator and denominator..

Answer 21

\[\huge\color{red}{ \frac{2x^2+13x+20}{x^2-5x-36} } \]
\[\huge\color{blue}{ \frac{ (2x~+~\text{_})(x~+~\text{_}) }{ (x~-~~\text{_})(x~+~\text{_})} }\]

Answer 22

Fill in blanks.

Answer 23

(2x+13x)(x+20)
(x-5x)(x+36)

Answer 24

Wow, no, you are incorrect.

Answer 25

darn! it was kind of confusing what number to put were sorry

Answer 26

Lets try to think.

For the top
2a+b=13
a*b=20

For the bottom
a-b=5
a*b=36

Answer 27

(a and b are the 2 constants)

Answer 28

ok i tried to do the problem and this is what i got 2(x+10)/x-9

Answer 29

No.

Answer 30

Can you factor it out?

(Again)

For the top
2a+b=13
a*b=20

For the bottom
a-b=5
a*b=36

Answer 31

ohh yea your right.

Answer 32

is there a 13 in it at all?

Answer 33

What do you mean?

Answer 34

like im not sure if its 13x+5 or 2(13x+5)

Answer 35

Do you know how to factor at all? To me you seem unprepared for this, do you want to learn how to factor?

Answer 36

yes please

Answer 37

Hold on, let's see, maybe
http://www.youtube.com/watch?v=v0dhpNnzZjA

Answer 38

Or I can make a question where you would get an IS tutor, I am not good at teaching from zero, sorry.

Answer 39

its ok i have to leave in a bit and need this done so maybe i can find another way

Answer 40

Alright.