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x^2+y^2=4; х-y=2

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The solution

You have entered [src]
 2    2    
x  + y  = 4
$$x^{2} + y^{2} = 4$$
x - y = 2
$$x - y = 2$$
x - y = 2
Rapid solution
$$x_{1} = 0$$
=
$$0$$
=
0

$$y_{1} = -2$$
=
$$-2$$
=
-2
$$x_{2} = 2$$
=
$$2$$
=
2

$$y_{2} = 0$$
=
$$0$$
=
0
Numerical answer [src]
x1 = -2.925908811382774e-25
y1 = -2.0
x2 = -3.269766353377449e-22
y2 = -2.0
x3 = 1.220027674161151e-23
y3 = -2.0
x4 = 2.0
y4 = 2.925908811382774e-25
x5 = 2.0
y5 = 7.179614916254797e-23
x6 = 1.425472203048186e-23
y6 = -2.0
x7 = -1.564469469860871e-22
y7 = -2.0
x8 = 2.0
y8 = 1.564469468874798e-22
x9 = 2.0
y9 = -4.122520150842681e-24
x10 = 2.0
y10 = -1.425472360820367e-23
x11 = 2.345862523385769e-24
y11 = -2.0
x12 = 2.0
y12 = 3.269766352391373e-22
x13 = 2.0
y13 = -1.220027674161154e-23
x14 = 4.122526464811411e-24
y14 = -2.0
x15 = 2.0
y15 = 6.756909143728019e-24
x16 = -7.179625013674402e-23
y16 = -2.0
x17 = 2.0
y17 = -2.345862523385769e-24
x18 = -6.756909143728019e-24
y18 = -2.0
x18 = -6.756909143728019e-24
y18 = -2.0