Factor the expression completely over the complex numbers. y4+14y2+49

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Aregular pentagon with a perimeter of 21 inches is dilated by a scale factor of 5/3 to create a new pentagon. what is the perimeter of the new pentagon?

Ineed to know the ordered pairs for this equation i need the answer quick because it’s a timed test

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.