The answer is X = 1 and Y = -2.
You have the Y, so input the equation next to why in the formula before to find x.
Like this:
x + x^2 - 3 = -1
2x^2 = 2
x = 1
Then input the answer of that, 1, into the first equation (y) to get your y, which would be -2. To check, input both the x and y into the bottom equation and see if it matches up to -1.
Hope this helps!