Odpowiedź:
a) y = - x² +5 x - 2
a = - 1 b = 5 c = -2
p = [tex]\frac{-b}{2 a} = \frac{-5}{2*(-1)} = 2,5[/tex]
Δ = b² - 4 a*c = 5² - 4*( - 1)*( - 2) = 25 - 8 = 17
q = - Δ : ( 4 a) = [tex]\frac{-17}{4*(-1)} = 4 \frac{1}{4}[/tex] = 4,25
W = ( p , q ) = ( 2,5 ; 4,25 )
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b ) y = - 3 x² - 3 x + 3
a = - 3 b = - 3 c = 3
p = [tex]\frac{3}{2*(-3)} = - 0,5[/tex]
Δ = ( - 3)² - 4*(- 3)*3 = 9 + 36 = 45
q = [tex]\frac{- 45}{4*(-3)} = 3,75[/tex]
W = ( - 0,5 ; 3,75 )
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Odpowiedź:
a) y = - x² +5 x - 2
a = - 1 b = 5 c = -2
p = [tex]\frac{-b}{2 a} = \frac{-5}{2*(-1)} = 2,5[/tex]
Δ = b² - 4 a*c = 5² - 4*( - 1)*( - 2) = 25 - 8 = 17
q = - Δ : ( 4 a) = [tex]\frac{-17}{4*(-1)} = 4 \frac{1}{4}[/tex] = 4,25
W = ( p , q ) = ( 2,5 ; 4,25 )
========================
b ) y = - 3 x² - 3 x + 3
a = - 3 b = - 3 c = 3
p = [tex]\frac{3}{2*(-3)} = - 0,5[/tex]
Δ = ( - 3)² - 4*(- 3)*3 = 9 + 36 = 45
q = [tex]\frac{- 45}{4*(-3)} = 3,75[/tex]
W = ( - 0,5 ; 3,75 )
====================
Szczegółowe wyjaśnienie: