- Thread starter bbm25
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-Dan

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The negative of a negative number is positive. For example, when x is -3, |x|= |-3|= -(-3)= 3.

But from what i understand, that's not what the picture says. What the picture says is |x| = -3The negative of a negative number is positive. For example, when x is -3, |x|= |-3|= -(-3)= 3.

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No, it says |x|= -x. Now, what is -x when x= -3?

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Lets suppose that \(\displaystyle f(x)=1-x\).But from what i understand, that's not what the picture says. What the picture says is |x| = -3

\(\displaystyle f(4)=-3\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle f(-4)=5\) Do you have any doubt whatsoever about that? If you do please post it.

Now suppose that \(\displaystyle g(x)=-x\)

\(\displaystyle g(4)=-4\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle g(-4)=-(-4)=4\) Do you have any doubt whatsoever about that? If you do please post it.

Now suppose that \(\displaystyle h(x)=|x|\)

\(\displaystyle h(4)=4\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle h(-4)=4\) Do you have any doubt whatsoever about that? If you do please post it.

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If you put a negative sign in front of a number it is not always negative. For example -3 IS a number and if I put a negative sign in front of it, -(-3), it becomes 3 which is positive.

Thank you so much. This is a very clear explanation.No, it says |x|= -x. Now, what is -x when x= -3?

This was very clear. Thank you so much for writing this!Lets suppose that \(\displaystyle f(x)=1-x\).

\(\displaystyle f(4)=-3\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle f(-4)=5\) Do you have any doubt whatsoever about that? If you do please post it.

Now suppose that \(\displaystyle g(x)=-x\)

\(\displaystyle g(4)=-4\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle g(-4)=-(-4)=4\) Do you have any doubt whatsoever about that? If you do please post it.

Now suppose that \(\displaystyle h(x)=|x|\)

\(\displaystyle h(4)=4\) Do you have any doubt whatsoever about that? If you do please post it.

\(\displaystyle h(-4)=4\) Do you have any doubt whatsoever about that? If you do please post it.