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Solve it bro

Any clue @alanli123

Or graph it?

then look at x intercepts?

i wabt to solve this manually not by graph

Ok use the rational roots theorem and plug in possible root values

wat is that

bro how old are u

my guess is only one. and that one root should be negative.

i used descartes rule of signs.

i think that method is very easy!

i can link you, http://mathworld.wolfram.com/DescartesSignRule.html.
yes it's quite easy.

nop i got it

haha really?
try again, http://mathworld.wolfram.com/DescartesSignRule.html

since there is no change of sign it does not have any + ve roots

is that correct

yes