Respuesta :

The answer is y = (-x - 4)(x - 9)
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HomertheGenius
y = - x² + 5 x + 36 = 
= - ( x² - 5 x - 36 ) = 
= - ( x² - 9 x + 4 x - 36 ) =
= - ( x ( x - 9 ) + 4 ( x - 9 ) ) =
= - ( x - 9 ) ( x + 4 )

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