Oblicz p i q a) y=x^2-x-2 b) y=2x^2-6x-2 c) y= -2x^2+6x-4 d) y= -6x^2-6x+8
a)
p=\frac{-b}{2a}
q=\frac{-\Delta}{4a}
\Delta=1+8=9
p=\frac{1}{2}
q=\frac{-9}{4}=-2\frac{1}{4}
b)
y=2x^2-6x-2
p=\frac{6}{4}=\frac{3}{2}
\Delta=36+16=52
q=\frac{-52}{8}=-\frac{13}{4}
c)
y=-2x^2+6x-4
p=\frac{-6}{-4}=\frac{3}{2}
\Delta=36-32=4
q=\frac{-4}{-8}=\frac{1}{2}
d)
y=-6x^2-6x+8
p=\frac{6}{-12}=-\frac{1}{2}
\Delta=36+192=228
q=\frac{-228}{-24}=9,5