2.
5% (5,000) - 5,000 (0,500) - 1,500 (0,500) - 1,500 (0,500)
If you want the answer you want to get it right, you need to change the equation to something that will work as expected.
The only thing that I'm concerned about is how much the second term should be.
$$a=x^2+y^2-2xy=4x^2+4y^2-4x+2y=6$$
should work because $x^2=y^2=4x$.
The first equation is $x=0$, and the second is $y=0$.
So, $a=x^2+y^2-2xy=4x^2+4y^2-4x=6$.
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