Question

Help? (3x^2 - 11x - 20)/(x^2 - 6x +5)

Answer 1

factor numerator
factor denomoninator

Answer 2

and see if somethings cancel out

Answer 3

I don't know how...

Answer 4

il help u factor numerator,
you're going to factor denominator.

deal ? :)

Answer 5

Okay

Answer 6

3x^2 - 11x - 20

tell me two numbers such that :-
1) product = -20*3 = -60
2) sum = -11

Answer 7

Uhh, 5 and 6 ? Idk

Answer 8

5*6 \(\ne\) -60

Answer 9

you need to look for factors of 60

Answer 10

-15*4 = -60
-15+4 = 11

Answer 11

so, -15 and 4 are our magic numbers

Answer 12

4 and 15

Answer 13

yes,

4 and -15

Answer 14

3x^2 - 11x - 20

3x^2 - 15x + 4x - 20

Answer 15

i just wrote -11x as, -15x + 4x

Answer 16

fine ?

Answer 17

3x^2 - 11x - 20

3x^2 - 15x + 4x - 20
-------- -------

3x(x-5) + 4(x-5)

Answer 18

Oh

Answer 19

3x^2 - 11x - 20

3x^2 - 15x + 4x - 20
-------- -------

3x(x-5) + 4(x-5)
---- ----

(x-5)(3x+4)

Answer 20

Done.
let me knw if u really get my cryptic thing above :o

Answer 21

I do. It's just hard for me since we just started this.

Answer 22

For the denominator, after factoring, would it be

x^2 - 3x + 2x +5 ?

Answer 23

x^2 - 6x +5

u need to find two numbers such that :-

1) product = 5*1 = 5
2) sum = -6

Answer 24

firs tell me,
wat are the two magical numbers u picked

Answer 25

Oooh, I did it wrong, I mixed them up. But it'd be -5 and 1

Answer 26

its -5 and -1

Answer 27

Yeah.

Answer 28

try it again :)

Answer 29

What

Answer 30

factor the denominator
remember our deal ? :o

Answer 31

Right

Answer 32

(x - 5)(5 - x) ?

Answer 33

step by step

Answer 34

That's wrong..

Answer 35

x^2 - 6x +5

x^2 -1x - 5x + 5

Answer 36

i just wrote -6x as, -1x-5x

Answer 37

x^2 - 6x +5

x^2 -1x - 5x + 5
------ ------

Answer 38

pull out GCF from first two terms
pull out GCF from last two terms

Answer 39

2 and 5 ?

Answer 40

first two terms, we can pull out oly x

Answer 41

x^2 - 6x +5

x^2 -1x - 5x + 5
------ ------

x(x-1) - 5(x-1)
---- ----

(x-1)(x-5)

Answer 42

Okay. I hope I can do the next one on my own

Answer 43

Thanks :)

Answer 44

good :)
factoring takes practice, just work 2-3 more problems. u wil feel confident im sure :)

Answer 45

I'll try

Answer 46

good luck !