Question

решите систему уравнений x^2+2y=-2 x+y=-1

Answer 1

x^2+2y=-2
x+y=-1
х=-1-у
(-1-у)²+2у=-2
у²+2у+1+2у=-2
у²+4у+1+2=0
у²+4у+3=0
D=4²-4(1*3)=4
y₁=-3
y₂=-1
x₁=-1+3=2
х₂=-1+1=0