Question

Решите
нужно до 15:00 сдать​

Answer 1

1 пример

$\left \{ {{3x+yx^{2}=2 } \atop {x=1-y}} \right. \\3(1-y)+yx^{2} =3\\y=1-0\\y=3\\x=1-0\\x=1-3\\x=1\\x=-2\\(x_{1},yx_{1} )=(1,0)$

2 пример

$\left \{ {{x^{2}+y^{2} } \atop {x=1-y}} \right. \\(1-y)^{2} +y^{2} =6y-7\\y=2\\x=1-2\\x=1\\(x.y)=(-1.2)$

3 пример

$\left \{ {{3x^{2}-y^{2}=22x } \atop {y=-4+2x}} \right. \\3x^{2} -(-4+2x)^{2} =22x$

система не имеет решения

4 пример

$\left \{ {{x^{2}+y^{2}=4 } \atop {x=4-y}} \right\\(4-y)^{2} +y^{2} =4$

нет решений

5 пример

$\left \{ {{y=13-ч} \atop {x^{2}-y=7 }} \right\\x^{2} -(13-x)=7\\x=-5\\x=4\\y=13-(-5)\\y=18\\y=9\\(x_{1},y_{1} )=(-5,18)\\(x_{2} ,x_{2})=(4,9)$