Mathematics
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OpenStudy (anonymous):
fan and medal for help with a few questions!!
thanks :)
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OpenStudy (anonymous):
im going to shove my feces up your anus
OpenStudy (anonymous):
:O
ganeshie8 (ganeshie8):
question ?
OpenStudy (anonymous):
Factor x2 + 5x + 6
OpenStudy (anonymous):
*Factor x^2 + 5x + 6
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ganeshie8 (ganeshie8):
find two numbers such that :
they add up to 5
they multiply to 6
ganeshie8 (ganeshie8):
lets try 3 and 2 :
3 + 2 = 5
3*2 = 6
they satisfy ! so it factors to :
(x + 3)(x + 2)
ganeshie8 (ganeshie8):
if that makes any sense.. .
OpenStudy (anonymous):
Yeah that makes sense!
ganeshie8 (ganeshie8):
good :)
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OpenStudy (anonymous):
but I don't have that as an option.
OpenStudy (anonymous):
oh never mind! SORRY it was just (x + 2)(x + 3)
OpenStudy (anonymous):
Factor x^2 + 8x + 12
OpenStudy (anonymous):
wtf
OpenStudy (anonymous):
I know :I
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OpenStudy (triciaal):
same process what are the factors of 12 that add up to 8
OpenStudy (anonymous):
well 4*3=12 but 4+4=8
ganeshie8 (ganeshie8):
try 6 and 2
OpenStudy (anonymous):
ohh... wow. Okay.
OpenStudy (anonymous):
So 6*2=12 and 6+2=8
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ganeshie8 (ganeshie8):
yes, so the factored form is ?
OpenStudy (anonymous):
(x+6)(x+2)
ganeshie8 (ganeshie8):
\(\large \color{red}{\checkmark}\)
OpenStudy (anonymous):
Yay! I have a couple more?
OpenStudy (anonymous):
Factor x^2 + 8x – 20
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ganeshie8 (ganeshie8):
sure :)
ganeshie8 (ganeshie8):
find two numbers such that :
they add to 8
they multiply to -20
OpenStudy (anonymous):
where did you get the -20 ?
ganeshie8 (ganeshie8):
from the given quadratic oly
-20 is the constant term
OpenStudy (anonymous):
okay
-2 and 10?
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OpenStudy (anonymous):
could you tell that took a while for me?
ganeshie8 (ganeshie8):
yess !
ganeshie8 (ganeshie8):
those are ur magic numbers :)
OpenStudy (anonymous):
so (x – 2)(x + 10)
ganeshie8 (ganeshie8):
\(\large \color{red}{\checkmark}\)
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OpenStudy (anonymous):
cool! :) I have two more!
Factor x^2 – 5x + 24
ganeshie8 (ganeshie8):
find two numbers such that :
sum = -5
product = 24
ganeshie8 (ganeshie8):
wait a sec,
there seems to be a typo in the sign in given quadratic... can u check it again ?
ganeshie8 (ganeshie8):
it should be :
\(\large x^2 – 5x \color{red}{-} 24\)
OpenStudy (anonymous):
Well that's what it said on my page.
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ganeshie8 (ganeshie8):
wat are ur options ?
OpenStudy (anonymous):
A.
(x – 12)(x – 2)
B.
(x – 3)(x – 8)
C.
(x – 4)(x – 6)
D.
prime
ganeshie8 (ganeshie8):
good :)
we cannot factor the given quadratic. tick \(prime\)
OpenStudy (anonymous):
okay cool!
OpenStudy (anonymous):
Last one!
Factor x^2 – 21x – 100
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OpenStudy (triciaal):
hint factors of 100 25,4