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Hi my sisters and brothers can tell me the answer because i don’t understand the question

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet

Solve the equation by completing the square. x^2+2x=17