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y=-2x²-12x+1
a=-2
b=-12
c=1
a) W(p,q)
p=-b/2a = 12/-4 = -3
Δ=b²-4ac = (-12)²-4*(-2)*1=144+8=152
q=-Δ/4a=-152/-8=19
b) y=a(x-p)²+q
y=-2(x+3)²+19
c) p=x=-3
d) W(-3,19)
Zwf=(-∞,19>
e) f(x) rośnie dla x∈(-∞,-3>
f(x) maleje dla x∈<-3,+∞)