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Tutorial - Simplifying expressions with complex numbers ex 7, (3 + root(-4))(4 + root(-1))

In this video playlist, you will learn everything you need to know with complex and imaginary numbers (3 + root(-4))(4 + root(-1)). Heavy snow warning as up to 30 inches to strike: 'Stay indoors' ...
New Scientist

A computer made from DNA can compute the square root of 900

A computer made from strands of DNA in a test tube can calculate the square root of numbers up to 900. Chunlei Guo at the University of Rochester in New York state and colleagues developed a computer ...