👉 Learn about Descartes' Rule of Signs. Descartes' rule of the sign is used to determine the number of positive and negative real zeros of a polynomial function. Knowing the number of positive and ...

In Microsoft Excel, the SIGN number is a math and trigonometry function that returns the sign of a number. The SIGN function returns 1 if the number is positive, zero if the number is 0, and -1 if the ...