Question

решите систему уравнений 5x²-9x=y
5x-9=y

Answer 1

5xˇ2-9x=y
5x-9=y
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5xˇ2-9x=5x-9, 5xˇ2-14x+9=0, D=196-180=16,VD=V(16)=4
a)x1=1/10(14+4)=1/10.(18)=1,8,y1=5.1,8-9=9-9=0
   x1=1,8,y1=0
b)x2=1/10(14-4)=1/10.(10)=1,y2=5.1-9=-4
   x2=1, y2=-4