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p= 4/2*(-2)= 4/-4= -1
f(-1)= -2*(-1)^2-4*(-1)-9=-2+4-9= -7=q
Postać kanoniczna; -2(x+1)^2-7
f(x)=1/3x^2+2x
p= -2/(2*1/3)= -2:2/3= -2*3/2= -3
f(-3)=1/3 *(-3)^2+2*(-3)=1/3*9-6=3-6 = -3=q
Postać kanoniczna: 1/3(x+3)^2-3
f(x)= -1/2x^2-3x-2 1/2
p= 3/(2*-1/2)= 3/-1= -3
f(-3)= -1/2*(-3)^2-3*(-3)- 2 1/2=-1/2 *9+9-2 1/2= -4 1/2+9-2 1/2= -7+9=2=q
Postać kanoniczna: -1/2(x+3)^2+2