Zapisz w postaci ogólnej :
a) y=3(x-7)(x+1)
b) -(x-3)do kwadratu +1
c) - (x+3)(x-3)
y=3x^2-18x-21
y=-(x^2-6x+9)+1=-x^2+6x-8
y= -x^2+9 ^[potęga]
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y=3x^2-18x-21
y=-(x^2-6x+9)+1=-x^2+6x-8
y= -x^2+9 ^[potęga]