2007-12-05 04:20:10 · 6 answers · asked by Racheal H 1 in Science & Mathematics ➔ Mathematics
*hi,
It isn't.
negative x negative=positive.
When adding negative quantities or anything which is confusing, always imagine of a number line. That made things easier for me.
2007-12-05 04:25:39 · answer #1 · answered by crashbird 2 · 1⤊ 0⤋
negative + negative = negative
(-1) + (-2) = (-3)
negative * negative = positive
(-1) * (-2) = (+2)
2007-12-05 12:24:09 · answer #2 · answered by cedric 3 · 2⤊ 1⤋
negative + negative is negative
However negative * negative is positive
Let x and y be positive numbers, so (-x) and (-y) are negative numbers.
y + (-y) = 0
(-x)[y + (-y)] = 0 (anything times 0 is 0)
(-x)y + (-x)(-y) = 0 (by multiplying out the brackets)
-(xy) + (-x)(-y) = 0
(-x)(-y) = xy (add xy to both sides)
But since x and y are both positive, xy is positive, and the product of any negative numbers -x and -y is positive.
2007-12-05 12:28:17 · answer #3 · answered by kindricko 7 · 0⤊ 0⤋
negative + negative = negative. It does not = a positive as you have suggested.
2007-12-05 12:24:54 · answer #4 · answered by ironduke8159 7 · 1⤊ 1⤋
its not....negative x negative is positive
2007-12-05 12:27:15 · answer #5 · answered by ? 2 · 1⤊ 0⤋
that's how it is dear
why are we all here??
who knows
2007-12-05 12:24:10 · answer #6 · answered by Anonymous · 0⤊ 4⤋