ANSWER : HERE IS THE ANSWER FOR YOUR QUESTION:
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CODE:
#include <iostream>
using namespace std;
int main()
{
int x,y,z;
cout<<"Enter x: \n";
//input the value of x from user
cin>>x;
cout<<"Enter y: \n";
//input the value of y from user
cin>>y;
//calculating the value of z using the equation
z=x*x + y *2;
cout<<"the value of z according to the equation x*x + y*2 is
= "<<z;
return 0;
}
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SNIPPET

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OUTPUT

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uploaded exercise 2 for reference
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attached exercise 2 below for reference.
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