how to multiply negatives

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- Jan 8th 2009, 11:20 AMJune Harrismultiplying negatives
how to multiply negatives

- Jan 8th 2009, 02:02 PMcraig
Whether it is numbers or $\displaystyle x$s you are multiplying the same rules apply.

let $\displaystyle +$ = positive number, and $\displaystyle -$ = negative number.

$\displaystyle +$ x $\displaystyle +$ = $\displaystyle +$

$\displaystyle +$ x $\displaystyle -$ = $\displaystyle -$

$\displaystyle -$ x $\displaystyle +$ = $\displaystyle -$

$\displaystyle -$ x $\displaystyle -$ = $\displaystyle +$

Two of the same, ie two plus's or two minus' always equal a plus, and two different ones always equal a minus.

Hope this makes sense