CS173: Intro to Computer Science - Functions (3 Points)

Developed by Professor Tralie and Professor Mongan.

Exercise Goals

The goals of this exercise are:
  1. To write mathematical expressions in Java
  2. To write a function that computes an expression and returns its result
  3. To call a function from main() and use its return value
Write a function that computes one of the roots of a quadratic equation. In addition to multiplying b by itself, you can compute b*b using the Math.pow() method. The Math.sqrt() method takes a double parameter, which is the number whose root should be computed, and returns the result as a double. Now write a program that calls a method that you will write to compute the quadratic root, and then have main() print the root that you calculate.
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Quadratic Formula



For reference, the quadratic formula is:



\[\frac{-b \pm \sqrt{(b^{2} - 4ac)}}{2a}\]



given an equation:



\[ax^{2} + bx + c = 0\]



In this exercise, you can simply compute one of the roots, as follows:



\[\frac{-b + \sqrt{(b^{2} - 4ac)}}{2a}\]