Question

doprowadź do postaci iloczynowej

y= -xkwadrat + 14x - 49

Answer 1

y=-x²+14-49

a=-1

b=14

c=-49

Δ=b²-4*a*c

Δ=14²-4*(-1)*-49

Δ=196-196

Δ=0

 

x₀=-b/2*a

x₀=-14/2*(-1)

x₀=-14/-2

x₀=7

 

y=a(x-x₀)²

y=-(x-7)²

Answer 2

y= -x²+14x-49
a= 1 b= 14 c=-49  
Δ= b² - 4ac 
Δ= 14² - 4 * (-1) * (-49) 
Δ= 196- 196 = 0
x₀= -b/2a 
x₀= -14/-1=7
y= a(x-x₀)²
y= -(x-7)²

 

Pozdrawiam, kate66 ;)