Respuesta :

Answer:

y=x²+8x+20

Step-by-step explanation:

y=(x+4)^2+4

y=(x+4)² + 4

y=(x+4)(x+4)+4

Expanding the bracket

y=(x²+4x+4x+16)+4

y=x²+8x+16+4

y=x²+8x+20

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