Question

х-у=1
Х^2-у^2=7
Решить систему

Answer 1

$left { {{x-y=1} atop {x^{2}-y^{2}=7}} right. \ \ left {{{y=x-1} atop { x^{2} -(x-1)^{2}=7}} right. \ \ left { {{y=x-1} atop { x^{2} - x^{2} +2x-1=7}} right. \ \ left { {{y=x-1} atop {2x=8}} right. \ \ left { {{y=x-1} atop {x=4}} right. \ \ left { {{y=3} atop {x=4}} right.$

Ответ: $(4;3)$

Answer 2

ой

Answer 3

ща

Answer 4

незачто)