Odpowiedź :
Cześć ;-)
x² + 5x + 6 = 0
a = 1
b = 5
c = 6
∆ = b² - 4ac = 5² - 4 · 1 · 6 = 25 - 24 = 1
√∆ = √1 = 1
x₁ = (-b - √∆)/2a = (-5 - 1)/(2 · 1) = -6/2 = -3
x₂ = (-b + √∆)/2a = (-5 + 1)/(2 · 1) = -4/2 = -2
-3 < -2
Odp. B
Pozdrawiam! ~ JulkaOdMatmy
[tex]x^2+5x+6=0\\x^2+2x+3x+6=0\\x(x+2)+3(x+2)=0\\(x+3)(x+2)=0\\x=-3 \vee x=-2[/tex]
[tex]-3<-2\Rightarrow \text{B}[/tex]