Mathematics
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OpenStudy (anonymous):
what value of x would the quotient (3x^2+4x-5)/(x+2) NOT make sense?
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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
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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.
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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.
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OpenStudy (anonymous):
gotcha
OpenStudy (anonymous):
And that would be dividing by zero, which would not make sense.