Question

4r^2-15r+9

Answer 1

factoring?

Answer 2

yea i got down to this so far

Answer 3

36r^2-15r+9

Answer 4

how did you aapproach the problem first hand when you tried

Answer 5

multiplied the first and last number

Answer 6

are you doing 36r^2-15r+9
or 4r^2-15r+9

Answer 7

the bottom one

Answer 8

oh i see so you doing ac method
good
so you did 36x9

Answer 9

yep

Answer 10

i just forget the rule after that

Answer 11

324 is the result correct

Answer 12

i need the factor not the final number

Answer 13

yes im just posting the number so we agree that its 324

Answer 14

we will look at the factor that give as the middle term

Answer 15

oh no itd be 4 * 9
which is where i got the 36 from

Answer 16

oh now you confused me
so we are doing 4r^2-15r+9 right?
because you wrote a totally different expression

Answer 17

4r^2-15r+9
then (4)(9)=36
so 36r^2-15r+9

Answer 18

and now what

Answer 19

nope that's no legible to do
36r^2-15r+9 is a different problem you have created
just stop at 4x9=36 and look for all the factor that add to -15

Answer 20

factor of 36 are ?

Answer 21

12 by 3

Answer 22

correct and they must be both negative -12 and -3

Answer 23

now what we do is rewrite that middle part as -15x=-12x-3x

Answer 24

that supposed to be r not x sorry

Answer 25

so the expression becomes 4r^2-12r-3r+9

Answer 26

regroup like this (4r^2-12r)-(3r-9)

Answer 27

is the answer (2r-12)(2r-3)

Answer 28

then let me ask you what can i do with the first parenthesis

Answer 29

no you are going fast! do it in step to get it

Answer 30

so 4r^2-12r what can we factor

Answer 31

2

Answer 32

why 2?

Answer 33

4r^2

Answer 34

*4r

Answer 35

4r(r-3)

Answer 36

good!

Answer 37

and for this 3r-9

Answer 38

3

Answer 39

yep

Answer 40

(4r-3)(-3r-3)

Answer 41

no you forgettting something
this is what we have so far 4r(r-3)-3(r-3)

Answer 42

mmmm true

Answer 43

(4r-3)(r-3)

Answer 44

yay!!

Answer 45

thanks I appreciate. awesome help and way to stick with me b!

Answer 46

you did great :)

Answer 47

no problem feel free :)