Odpowiedź:
a) y= -2(x²-6x+9)+6=-2x²+12x-18+6=-2x²+12x-12
b) y= -1/2(x²+x+1/4)+1/2=-1/2x²-1/2x-1/8+4/8=-1/2x²-1/2x+3/8
c) y=3(x²-10x+25)+9=3x²-30x+75+9=3x²-30x+84
