Question

18............................

Answer 1

$left { {{y-2x^{2}=0} atop {2x-2y+7=0}} right. = left { {{y=2x^{2}} atop {2x-2y+7=0}} right. = left { {{y=2x^{2}} atop {2x-2*2x^{2}+7=0}} right. \2x-4x^{2}+7=0\4x^{2}-2x-7=0\D=(-2)^{2}-4*4*(-7)=4+112=116 textgreater 0\x1.2= frac{2+- sqrt{116} }{8}\y1.2=2(frac{2+- sqrt{116} }{8})^{2}$
Ответом будет два корня