public class Sample3_1 {
	public static void main(String[] args) {
		int x = 5;	// 宣言と代入を同時に
		System.out.println(" x = " + x + " のときは\n x^2 + 3x + 2 = " + (x*x + 3*x + 2) + " だよ！");
	}
}