Respuesta :

Answer:

y=-9x²+54x+63

Step-by-step explanation:

y=-9(x²-7x+x-7)

y= -9(x²-6x-7)

y=-9x²+54x+63

y=-9(x^2-7x+x-7)
y=-9(x^2-6x-7)
y=-9x^2+6x+63