Odpowiedzi

2010-04-07T14:22:41+02:00
W(x)=2x²+7x-4

Δ=7²-4×2×(-4)
Δ=49+32
Δ=81
√Δ=9
x1=(-7-9)/2*2=-4
x2=(-7+9)/2*2=1/2

a(x-x1)(x-x2)
2(x+4)(x-1/2)