Найдите все решения системы уравнений:
[tex] \left \{ {{y= x^{2}} \atop {y=-x+2}} \right. [/tex]
[tex] \left \{ {{y= x^{2}} \atop {y=-x+2}} \right. [/tex]
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х²+х-2=0
D=1+8=9
х=1
х=-2
у=1²=1
у=(-2)²=4