Ex. Simplify (-4) (+5) :
Since multiplication can occur in any order this is the same as (+5) (-4) and would produce an answer of -20.
There for (...) (-4) (+5) = -20
Multiplying two negative number together is more complicated ti understand.
Let's examine the pattern produced by the following to see if we can determine what will happen.
(+3) (-5) = -15
(+2) (-5) = -10
(+1) (-5) = -5
(0) (-5) = 0 Increases by 5
(-1) (-5) = +5
(-2) (-5) = +10
(-3) (-5) = +15
(NEGATIVE) (NEGATIVE) = POSITIVE
When multiplying two negative the result is positive. It is as follows:
-the number themselves multiply as usual, and
-the two negative signs multiply to produce a positive.
Ex. simplify (-3) (-4) :
(-3 ) (-4) = +12
Insummation, when multiplying two numbers with the same sign the result is positive. Wherea, When mutiplying two numbers with opposite signs the result is negative.
(+) (+) = +
(-) (-) = +
(+) (-) = -
(-) (+) = -
(+) (+) = +
(-) (-) = +
(+) (-) = -
(-) (+) = -
Had nothing better to do -_-
