Question

19. Решите систему уравнений:
(2x - y = 16?
x = 10,
{x + y =9,
B)
B
x - 5xy = 160;
3) (x-1)(y + 1) = 0;
x - y = 8,
1(x + 2)(y - 4) = 0;
1)
6
{
ly=7,
xy + y = 42.com
\42.​

Answer 1

1) x^2+x*y-2*y^2

2) 2*x^2-3*x*y+3*y^2=80