смотри во вложения!!!!!!!!!!!!!!!!!!!!!!!
y=2-3x
x^2-4+12x-9x^2+12=0
-8x^2+12x+8=0
2x^2-3x-2=0
D=9+16=25=5^2
x1=2
x2=-0.5
y1=-4
y2=3.5
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смотри во вложения!!!!!!!!!!!!!!!!!!!!!!!
y=2-3x
x^2-4+12x-9x^2+12=0
-8x^2+12x+8=0
2x^2-3x-2=0
D=9+16=25=5^2
x1=2
x2=-0.5
y1=-4
y2=3.5