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

Essentially, an imaginary number is the square root of a negative number and does not ... numbers is useful in the multiplication and division of imaginary numbers. After grouping the coefficients ...

A negative number times itself is a positive number ... subtraction, multiplication and division on complex numbers makes it possible to use them in calculus. From here, much of what scientists ...

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 ...