Precalculus

Give an example to show that the product of two one-to-one function is not necessarily a one-to-one function.

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1. y=x
y=-x
y^2 = -x^2

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posted by Damon
2. Sorry I don't understand y^2=-x^2 ??
Shouldn't it be:(y)(y)=(x)(-x)
y^2 = -x ??

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posted by jh
3. (x)(-x) = -x^2

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posted by Damon

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