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Mathematics 8 Online
OpenStudy (anonymous):

i whould like some one to show me how to do this plzzzz What are the excluded values? https://crookcountysd.owschools.com/media/g_alg01_2013/10/267.gif

OpenStudy (helder_edwin):

u have a fraction. what is it that u must avoid in this case?

OpenStudy (anonymous):

ok

OpenStudy (helder_edwin):

u must avoid division by zero. right?

OpenStudy (anonymous):

ok

OpenStudy (helder_edwin):

so, in this excercise, when do u have division by zero?

OpenStudy (helder_edwin):

in other words, solve the equation \[\large x(x-3)=0\]

OpenStudy (anonymous):

(x-3)=0 right

OpenStudy (helder_edwin):

u have two factors. set each equal to zero.

OpenStudy (anonymous):

ok im so lost

OpenStudy (helder_edwin):

u must have learned this in school: from \[\large x(x-3)=0 \] u get \[\large x=0\quad\text{or}\quad x-3=0 \] and from this \[\large x=0\quad\text{or}\quad x=3 \] so the excluded values are x=0 and x=3

OpenStudy (anonymous):

0 what happend to the 2

OpenStudy (helder_edwin):

it is in the numerator: it does not matter

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