Odpowiedź:
y = a*( x - 2)*( x + 6) A = ( 4, - 13 )
więc
- 13 = a*(4 - 2)*( 4 + 6)
- 13 = 20 a
a = - [tex]\frac{13}{20}[/tex]
y = - [tex]\frac{13}{20} *(x - 2)*( x + 6)[/tex]
-------------------------------------
y = - [tex]\frac{13}{20} *(x^{2} + 6 x - 2 x - 12) = - \frac{13}{20} *(x^{2} + 4 x - 12)[/tex]
y = - [tex]\frac{13}{20} x^{2} - \frac{13}{5} x + \frac{39}{5}[/tex]
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Odpowiedź:
y = a*( x - 2)*( x + 6) A = ( 4, - 13 )
więc
- 13 = a*(4 - 2)*( 4 + 6)
- 13 = 20 a
a = - [tex]\frac{13}{20}[/tex]
y = - [tex]\frac{13}{20} *(x - 2)*( x + 6)[/tex]
-------------------------------------
y = - [tex]\frac{13}{20} *(x^{2} + 6 x - 2 x - 12) = - \frac{13}{20} *(x^{2} + 4 x - 12)[/tex]
y = - [tex]\frac{13}{20} x^{2} - \frac{13}{5} x + \frac{39}{5}[/tex]
=======================
Szczegółowe wyjaśnienie: