1. Explain why the invention of variables was a good idea. (Hint: how were formulas described before that?) When were they invented? By whom?
2. Describe, step by step, an algorithm that, given three real numbers a, b, and c, returns the values x for which a*x+b=c.
viete 1520 francois_viete francois-viete francois viete4. In Java, strings are described by double quotes. For example, the text Java is described as follows:
"Java"Describe, in Java, the two strings that contain the following two texts:
Francois Viete At a conference SCAN'04, Viete said: "I invented variables."