1 times 69 is 69, but what is the answer if both 1 and 69 are negative numbers? Here we will determine if the answer to negative 1 times negative 69 is positive 69 or negative 69.
There are many different ways to explain and determine if the answer to negative 1 times negative 69 is -69 or +69 using mathematical terms such as additive inverse and mathematical laws like the Distribute Law.
We will take a different approach - process of elimination: We will simply test if -69 is the correct answer using basic algebra.
We will test if -69 is correct by setting up the equation negative 1 times negative 69 equals negative 69, and then simplifying the equation to see if it is true.
(-1) (-69) = (-69)
Divide both sides of the equation by (-69) :
|
| = |
|
The numerator and denominator on the left side both have (-69) which even each other out and can be removed:
| (-1) = |
|
The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-1) = |
|
A numerator of 69 and denominator of 69 on the right side is the same as 69 divided by 69 which is 1. Now we end up with this untrue equation:
(-1) = (1)
-1 is NOT equal to 1, thus we have proven that negative 1 times negative 69 is not equal to -69. The answer must therefore be 69:
-1 x -69 = 69
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 1 times negative 69 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 1 times negative 70?
Here is the next problem on our list that we have explained and calculated.
Copyright | Privacy Policy | Disclaimer | Contact