При x = 2, y = 1, при y = -2, х = -1
Ответ:
Смотрите фото, там всё написано
2a-5=7а-5/3а-9
Домножим обе части на (3а-9)
(3а-9)(2a-5)=7а-5
6a^2-18a-15a+45=7a-5
6a^2-33a+45-7a+5=0
6a^2-40a+50=0
Сократим на 2
3a^2-20a+25=0
D=400-4*3*25=400-300=100=10^2
a1=20-10/6=10/6=5/3
а2=20+10/6=30/6=5
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