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Mathematics 10 Online
OpenStudy (melissa_something):

x+7/ x+8 <3

OpenStudy (melissa_something):

OpenStudy (melissa_something):

No, this is much more difficult :(

OpenStudy (anonymous):

ok factor the polynomail first

OpenStudy (xapproachesinfinity):

which question are you attempting

OpenStudy (xapproachesinfinity):

i see two questions

OpenStudy (xapproachesinfinity):

the second one try to factor by grouping

OpenStudy (melissa_something):

Omg my bad

OpenStudy (melissa_something):

OpenStudy (xapproachesinfinity):

\[\Large x^3+3x^2-x-3>0 \Longrightarrow x^3-x+3x^2-3>0\\ x(x^2-1)+3(x^2-1)>0\]

OpenStudy (melissa_something):

I already simplified it to -2x-17/ x+8

OpenStudy (melissa_something):

Woah what is that

OpenStudy (xapproachesinfinity):

the second one you posted

OpenStudy (xapproachesinfinity):

\[(x+3)(x-1)(x+1)>0\] now solve it

OpenStudy (melissa_something):

Omg my bad :(

OpenStudy (melissa_something):

It's supposed to be #17

OpenStudy (xapproachesinfinity):

oh made a mistake !

OpenStudy (xapproachesinfinity):

\[\Large \frac{x+7}{x+8}<3 \Longrightarrow \frac{-2x-17}{x+8}<0\] set -2x-17=0 and x+8=0

OpenStudy (xapproachesinfinity):

-8 is excluded solution

OpenStudy (xapproachesinfinity):

so what did you do ?

OpenStudy (melissa_something):

x= -17/2

OpenStudy (xapproachesinfinity):

what is that?

OpenStudy (xapproachesinfinity):

you are supposed to have x=-8, x=-17/2 draw a number line

OpenStudy (xapproachesinfinity):

put those two point on the number line test some point and see what intervals work

OpenStudy (xapproachesinfinity):

have you ever dealt with inequalities

OpenStudy (xapproachesinfinity):

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