X will complete the code to calculate  c = a2 + b2 + 2ab ? public class MyCalc {    public int powerSq(int num) {       return num * num;    }    public int mult(int a, int b) {       return a * b;    }    public static void main(String [] args) {       int a = 1;       int b = 2;       int c;       MyCalc myCalc = new MyCalc();       XXX      } } answers: 1) c = powerSq(a) + powerSq(b) + 2 * mult(a); 2) c = powerSq(a, b) + powerSq(a, b) + 2 * mult(a, b); 3) c = myCalc.powerSq(a) + myCalc.powerSq(b) + 2 * myCalc.mult(a); 4) c = myCalc.powerSq(a) + myCalc.powerSq(b) + 2 * myCalc.mult(a, b)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question

Which XXX will complete the code to calculate  c = a2 + b2 + 2ab ?

public class MyCalc {
   public int powerSq(int num) {
      return num * num;
   }
   public int mult(int a, int b) {
      return a * b;
   }
   public static void main(String [] args) {
      int a = 1;
      int b = 2;
      int c;
      MyCalc myCalc = new MyCalc();
      XXX  
   }
}

answers:

1) c = powerSq(a) + powerSq(b) + 2 * mult(a);
2) c = powerSq(a, b) + powerSq(a, b) + 2 * mult(a, b);
3) c = myCalc.powerSq(a) + myCalc.powerSq(b) + 2 * myCalc.mult(a);
4) c = myCalc.powerSq(a) + myCalc.powerSq(b) + 2 * myCalc.mult(a, b);
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