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myininaya
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2y2=15 or 2y2=15
solve both for y

lilg132
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8.5

lilg132
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i thought you cant have an abosolute value that = to a negative number?

myininaya
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we have
something=positive

myininaya
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not something=negative

lilg132
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but you wrote or 2y2=15
?

myininaya
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\[2y=17 => y=\frac{17}{2}\]
\[2y=13 => y=\frac{13}{2}\]
i wrote that because we havesomething=positive
gives us two cases

lilg132
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oh ok but if it is
something = negative
then we have no soloution right?

myininaya
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right!

lilg132
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thanks for that was abit confused

myininaya
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tomas yes you can probably have several
i know for a fact you can have two
i don't think there is a limit

myininaya
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f(x)>=0
so thats why f(x) can not have negative output

lilg132
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ok thanks :)