Відповідь:
[tex]\displaystyle \left \{ {{x-y=9}\;\;\;\;\;\;\; \atop {x^2-y^2=225}} \right. \\\\\\\left \{ {{x-y=9}\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; \atop {(x-y)(x+y)=225}} \right. \\\\\\\left \{ {{x-y=9}\;\;\;\;\;\;\;\; \atop {9(x+y)=225}} \right.\\\\\\\left \{ {{x-y=9} \atop {x+y=2}} \right. +\\\\\\2x=34\\\\x=17\\\\y=25-x=25-17=8\\[/tex]
[tex]x=17, y = 8[/tex]
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Відповідь:
[tex]\displaystyle \left \{ {{x-y=9}\;\;\;\;\;\;\; \atop {x^2-y^2=225}} \right. \\\\\\\left \{ {{x-y=9}\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; \atop {(x-y)(x+y)=225}} \right. \\\\\\\left \{ {{x-y=9}\;\;\;\;\;\;\;\; \atop {9(x+y)=225}} \right.\\\\\\\left \{ {{x-y=9} \atop {x+y=2}} \right. +\\\\\\2x=34\\\\x=17\\\\y=25-x=25-17=8\\[/tex]
[tex]x=17, y = 8[/tex]