Prove with Example that:- (-) + (-) = ( + )

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1. 71
skgraoposted 7 years ago

Prove with Example that:-
(-) + (-) = ( + )

I like a good answer.

2. 81
R.S. Hutchinsonposted 7 years ago

-2 (-3) + (-2) =

6 + (-2) =

6 - 2 =

4 (where as 4 is a positive)

RS for President!

3. 85
Ania Lposted 7 years ago

It's not true for all numbers though, like:

-1(-1) + (-2) =
1 +(-2) =
1-2 =
-1

unless you add one more set of brackets:
- ( (-) + (-) ) = (+)

4. 95
ktrappposted 7 years ago

You can think of the first negative sign as taking the opposite of what is in the first set of parenthesis. So the opposite of negative 6 is positive 6. And then positive 6 plus negative 5 = positive 1.

-(-6) + (-5)

6 + (-5)

1

5. 90
arksysposted 7 years ago

if you use "x" with numbers you can get positive result.

-(-1x)+(-2x)=3x
1x-2x=3x
1x=3x+2x
1x=5
x=5

6. 0
fordieposted 7 years ago

Let:

- represent one seed;
+ represent two seeds; and let
( and ) both represent a mouth that will eat one seed if there is anything on offer.

On the left-hand side we get:

1 seed, eaten. Another seed, eaten. Two seeds, one eaten, one left. Another added but then that one is eaten. Remainder = one seed

On the right-hand side the action is much quicker:

A wasted bite (cheating here?!). Two seeds, one eaten. Remainder = one seed

working