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Mathematics 13 Online
OpenStudy (anonymous):

factor completely: see below:

OpenStudy (anonymous):

\[x ^{2}+2x-24\]

OpenStudy (anonymous):

find two numbers that add to positive 2 and multiply to negative 24

OpenStudy (anonymous):

nothing is coming to me

OpenStudy (anonymous):

bruh just think about it

OpenStudy (anonymous):

24 1

OpenStudy (anonymous):

24+1 is 25 and 24-1 is 23

OpenStudy (anonymous):

-12 2

OpenStudy (anonymous):

no thats not it either

OpenStudy (anonymous):

here il tell u what i do

OpenStudy (anonymous):

i just grab a calculator and type 24/ whatever

OpenStudy (anonymous):

24 divided by 1 24 divided by 2 24 divided by 3?????

OpenStudy (anonymous):

and i try values till i get two numbers that have a difference of 2

OpenStudy (anonymous):

and guess what 24/4=6

OpenStudy (anonymous):

!!

OpenStudy (anonymous):

6??

OpenStudy (anonymous):

6-4=2

OpenStudy (anonymous):

good!

OpenStudy (anonymous):

unbelieveable. I would of never got that. thank you

OpenStudy (anonymous):

it works now u just put it in the parentheses with x

OpenStudy (anonymous):

make sure that the negative goes with the 4

OpenStudy (anonymous):

(x+6)(x-4)???

OpenStudy (anonymous):

ok got it. larger number goes with the first sign?

OpenStudy (anonymous):

not always u gotta test it and make sure

OpenStudy (anonymous):

oh ok. got it

OpenStudy (anonymous):

if the number u want has to be positive then the smaller number gets the minus

OpenStudy (anonymous):

lets work on another one

OpenStudy (anonymous):

Ya you should do some of these to practice cuz i used to suck at them and now its like automatic

OpenStudy (anonymous):

\[x ^{2}-9x+18\]

OpenStudy (anonymous):

3 and 6?

OpenStudy (anonymous):

yep just find the right signs

OpenStudy (anonymous):

(x-6)(x-3)?

OpenStudy (anonymous):

perfect mang

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

\[x ^{2}-4x+7\]

OpenStudy (anonymous):

r u making these up or getting them from a book?

OpenStudy (anonymous):

not looking like its factorable

OpenStudy (anonymous):

from a book

OpenStudy (anonymous):

nothing goes in to 7 that equals 4 so the answer would be not factorable correct?

OpenStudy (anonymous):

yep thats right

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