<span>2(х-3/2)+1 4(х-2)-1 =-х</span>
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Y=x², y=2x+3
x²=2x+3
x²-2x-3=0
(x-3)(x+1)=0
a)x1=3, y1=9, P1/3,9/
b)x2=-1,y2=1,P2/-1,1/