92 times 90 is 8280, but what is the answer if both 92 and 90 are negative numbers? Here we will determine if the answer to negative 92 times negative 90 is positive 8280 or negative 8280.
There are many different ways to explain and determine if the answer to negative 92 times negative 90 is -8280 or +8280 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 -8280 is the correct answer using basic algebra.
We will test if -8280 is correct by setting up the equation negative 92 times negative 90 equals negative 8280, and then simplifying the equation to see if it is true.
(-92) (-90) = (-8280)
Divide both sides of the equation by (-90) :
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| = |
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The numerator and denominator on the left side both have (-90) which even each other out and can be removed:
| (-92) = |
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The numerator and denominator on the right side both have a minus sign (-) which even each other out and can be removed:
| (-92) = |
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A numerator of 8280 and denominator of 90 on the right side is the same as 8280 divided by 90 which is 92. Now we end up with this untrue equation:
(-92) = (92)
-92 is NOT equal to 92, thus we have proven that negative 92 times negative 90 is not equal to -8280. The answer must therefore be 8280:
-92 x -90 = 8280
The above applies to all math problems where you multiply two negative numbers. Multiplying two negative numbers such as negative 92 times negative 90 will always have a positive answer.
Negative Times Negative Calculator
Here you can multiply another two negative numbers together.
What is negative 92 times negative 91?
Here is the next problem on our list that we have explained and calculated.
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