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Mathematics 12 Online
OpenStudy (anonymous):

what value of x would the quotient (3x^2+4x-5)/(x+2) NOT make sense?

OpenStudy (anonymous):

Oh! I know! So you know that you cannot divide by zero, right?

OpenStudy (anonymous):

yes I cannot divide by zero lol

OpenStudy (nurali):

That expression is undefined when x=-2 since division by zero is undefined.

OpenStudy (anonymous):

So what number could you put for x that would make the bottom where you divide zero?

OpenStudy (anonymous):

I really don't know

OpenStudy (anonymous):

Ok, so the bottom of the equation is (x+2) right?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

If you put -2 in for x, it would be the same as dividing by zero.

OpenStudy (anonymous):

so that would be the answer?

OpenStudy (anonymous):

So if x is -2, it would Not make sense.

OpenStudy (anonymous):

Do you get it? Huh?

OpenStudy (anonymous):

so the answer is (x-2) ?

OpenStudy (anonymous):

No, the answer is just -2.

OpenStudy (anonymous):

oh okay thank you!

OpenStudy (anonymous):

Because the bottom is (x+2), so when you put -2 in the bottom, it is (-2+2) which is zero.

OpenStudy (anonymous):

gotcha

OpenStudy (anonymous):

And that would be dividing by zero, which would not make sense.

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