two-negatives-can-make-a-positivemod

Two Negatives Can Make a Positive

I don't not like pizza -- this means you do like pizza!!

It works for multiplication -- (-2)(-5) = 10.

BUT NOT FOR ADDITION AND SUBTRACTION

-2-5 = -7 (this can also be written as -2 + -5)

-2 + 5 = 3

This video shows examples of positives and negatives using the distributive property. Watch out for the negative signs -- the minus sign is the most common mistake in Math. You have to just know you are going to make that type of mistake and check for it ;)

The examples are:

5(1 + 2) = 5 + 10 = 15

5(x + 2) = 5x + 10

5(1 - 2) = 5 - 10 = -5

-2(x + 5) = -2x -10

-5(x - 2) = -5x + 10

-2(x + 5) -5(x - 2)

-2x -10 - 5x + 10 = -7x

while -2x + 5x = 3x

Tagged under: Math,distributive property,negative signs

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