public class Sample3_1b {
	public static void main(String[] args) {
		int x, y;	// 宣言
		x = 5;	// 代入
		y = x*x + 3*x + 2;
		System.out.println(" x = " + x + " のときは\n x^2 + 3x + 2 = " + y + " だよ！");
	}
}