Помогите решить систему уравнений ( x-y) (x^2-y^2)=45 x+y=5

[latex] left { {{(x-y)(x^2-y^2)=45,} atop {x+y=5;}} ight. left { {{(x-y)(x-y)(x+y)=45,} atop {x+y=5;}} ight. left { {{(x-y)^2(x+y)=45,} atop {x+y=5;}} ight. left { {{(x-y)^2cdot5=45,} atop {x+y=5;}} ight. \ left { {{(x-y)^2=9,} atop {x+y=5;}} ight. left { {{left [ {{x-y=-3,} atop {x-y=3,}} ight.} atop {x+y=5;}} ight. left [ {{left { {{x-y=-3,} atop {x+y=5,}} ight.} atop {left { {{x-y=3,} atop {x+y=5;}} ight.}} ight. [/latex] [latex]left [ {{left { {{2x=2,} atop {y=5-x,}} ight.} atop {left { {{2x=8,} atop {y=5-x;}} ight.}} ight. left [ {{left { {{x=1,} atop {y=4,}} ight.} atop {left { {{x=4,} atop {y=1;}} ight.}} ight. \ (1;4), (4;1).[/latex]