решите систему уравнений
1){ x2+y2=74
{ x+y=12
2) { x2-y2=32
{x-y=4
3) {x+y=3
{xy= -40
4) { (x-2) (y+1) = 1
{ x-y=3
1){ x2+y2=74
{ x+y=12
2) { x2-y2=32
{x-y=4
3) {x+y=3
{xy= -40
4) { (x-2) (y+1) = 1
{ x-y=3
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