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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asked by jh
  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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