Image caption, This multiplication table includes both positive and negative numbers. Follow the pattern to see the effect of multiplying by negative numbers.

An imaginary number is a number that, when squared, has a negative result. Skip to main content. Open menu Close menu. ... Math Warehouse: How to Multiply Imaginary Numbers.

The Ancient Greeks rejected negative numbers as absurd, by 600 AD, the Indians had written the rules for the multiplication of negative numbers and 400 years later, Arabic mathematicians realised the ...

Save guides, add subjects and pick up where you left off with your BBC account. a) We have \({+5}\) and \({-4}\). The signs are different, so the answer will be negative. So, \(+5 \times -4 = -20 ...