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BJP3 Exercise 3.8: quadratic

Language/Type: Java Math method basics parameters
Author: Whitaker Brand (on 2013/04/01)

Write a method called quadratic that solves quadratic equations and prints their roots. Recall that a quadratic equation is a polynomial equation in terms of a variable x of the form a x2 + b x + c = 0. The formula for solving a quadratic equation is:

quadratic equation

Here are some example equations and their roots:

equation x2 - 7x + 12 x2 + 3x + 2
call quadratic(1, -7, 12); quadratic(1, 3, 2);
output 
First root = 4.0
Second root = 3.0

First root = -1.0
Second root = -2.0

Your method should accept the coefficients a, b, and c as parameters and should print the roots of the equation. You may assume that the equation has two real roots, though mathematically this is not always the case.

Also, there should be two roots, one the result of the addition, the other, the result of the subtraction. Print the root resulting from the addition first.

Type your solution here:


This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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