解题思路:
注意事项:
正负两个根
参考代码:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int a = scanner.nextInt();
int b = scanner.nextInt();
int c = scanner.nextInt();
double delta = b * b - 4 * a * c;
double x1 = (-b + Math.sqrt(delta)) / 2 * a;// sqrt求平方根
double x2 = (-b - Math.sqrt(delta)) / 2 * a;
System.out.println(String.format("%.2f", x1) + " "+ String.format("%.2f", x2));//输出保留两位小数
}
}
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