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If x^2+6x=9, what is the value of (x+3)^2? The answer is 18. I completed the square but i'm not sure what to do next? What will be the possible offspring for a dad who is heterozygous for type A blood and a mom who is heterozygous for type B blood? Una caja que contiene un guijarro se conecta a un resorte horizontal ideal y oscila sobre una mesa de aire sin fricciÃ³n.? A linear expression does not have a squared variable? What is "Hormuz Iron Oxide"?