December 2018 1 69 Report
Oblicz miejsce zerowe funkcji kwadratowej f i zapisz ja w postaci iloczynowej gdy:
A) f(x)= x do kwadratu - 4x+4
B) f(x) = 1\2 x do kwadratu - 2
C) f( x) = -2x do kwadratu -4x-2
D) f(x)= -0.75x do kwadratu + 2,25

proszę o poprawne odpowiedZi na lekcji robione było to tak podań na przykładzie

F(x) = - 3x do kwadratu + 9x

Delta wzór: b do kwadratu - 4ac
Delta 9 do kwadratu -4 razy -3 razy 0
Delta = 81-0
Delta = 81

2 miejsca zerowe
X1= -b- delta
2a

X1=-9- 81 pod pierwiastkiem
2 razy -3

X1=-9-9
-6

X1= -18
-6
X1= 3

X2= -b+ delta
2a

I to samo

Y= a(x- x1) ( x- x2)
Y= -3 ( x- 3) ( x+0)

Podług tego proszę o pomoc w zależności ile jest miejsc zerowych na jedno
Xo:= - b
2a




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